高中英语情态动词专项
第一篇：高中英语情态动词专项
情态动词专项
1.can
①(表能力)能…，会…
She can drive, but she can’t ride a bike.
A computer can’t think for itself.(不会思考)
②(可能，许可)能够…，可以…
The noise outside has stopped , now I can get down to my study.
--Can I use your telephone? --Yes, of course, you can.
You can go out to play when you do away with your homework.
③有时会…，偶尔…，
The climate of East China can be pretty cold in winter.
Jogging can be harmful for the health.
Even experienced teachers can make mistakes.
London could be rather cold in summer while I stayed there.
④(表温和的命令)请做…，得…
I’ll do the cooking, and you can do the washing.(请你去洗衣服)
You can go now.
⑤(表示猜测)可能…
Can he be working till so late?
Who can it be at this time of day?
Can it be Tom? No, it can’t be Tom.
He is busy these days, so he can’t come today.
can 与be able to 的区别：
The fire spread through the hotel very quickly, but everyone was able to get out.(强调设法干成某事)
2.shall
⑪用于一三人称的问句中，表示征求对方的意见
Shall I shut the window? Yes, please.
Shall she go to the concert with us this evening?
Shall they come in?
Shall we go out for a walk?
⑫用于二三人称 ，表示命令，允诺，警告，威胁，强制
①You shall go to the front at once.(命令)
②Don’t worry .You shall get the answer this afternoon.(允诺)
③I promise she shall get a nice present on her birthday. (允诺)
④He shall be punished. 威胁
⑤You shall listen to me. (命令)
⑥The interest(利益利润)shall be divided into five parts, according to the agreement made by both sides. (命令法规)
⑦It has been announced that candidates(候选人) shall remain in their seats until all the papers have been collected.(表按规定)
3.must
⑪必须
I must keep my word.
You must get up much earlier.
⑫不必needn’t/don’t have to
--Must I wash the dishes at once?
-- No, you needn’t./don’t have to.
⑬mustn’t 禁止，不许
You mustn’t play with the knife.
Cars mustn’t be parked here.
--May I use your pen?
--No, you mustn’t
⑭(表必然性)必定
Everyone must die.
⑮(表固执，不满等)偏要硬要
Our there-year-old boy must do the opposite to what we ordered.
Just when I was busy, the neighbor must come and chat.
Why must you be so stubborn(倔强的)?
If you must know, I’m going to help him look for an apartment.
4. should
⑪ 应该
You should apologize to him.
We should attend the meeting.
⑫ (表预期)按理会…， 想必会…，一定会…
The concert should be great fun.
The photos should be ready by 12:00.
The old man is always hunting the lions, so terrible things should happen to him. ⑬ (表惊讶，遗憾)竟然居然
I’m glad that your story should speak in such a way.
I wonder that a person like him should make such a mistake.
It’s a pity that he should resign.
⑭ (用于条件状语从句中)一旦，万一
If she should know the truth, she would be depressed.
If you should change your mind, let us know.
Ask him to call me up if you should see him.
⑮ (用于lest, for fear that, in case引导的句子)以免，唯恐
She gave me a list just in case I should forget what to buy.
He ran away lest he should be caught.
He gets up early for fear that he should miss it.
5. would
①(表过去的习惯行为)常常经常
When I was a child, I would often go skiing.
We would stay up all night talking about our future.
Every morninghe would go for a walk.
When he was here, he would go to that coffee shop at the corner after work everyday. 区别used to do sth过去常常
I use to be a waiter, but now a taxi driver.
There used to be a cinema here before the war.
Our country isn’t what it used to be.
②(表示说话者的厌烦焦躁)老是偏要
That’s exactly like Susie. She would come to me just when I was busy.
(老是在我忙碌时来找我)
I told him not to go, but he would not listen.(可他偏不听)
③ (用于if 从句)愿意乐意
If you would go there instead of me, I should be very glad.
如果你愿意代替我去那儿，我会很高兴的。
You could win if you would try要是你愿意尝试， 你会赢的
④ (用于否定句中，主语一般是事物，表某事物暂时的特性)就是不能 That window wouldn’t open.
That morning my car wouldn’t start.
When I called on him this morning, his dog wouldn’t let me in.
The door won’t open.
The car won’t start.
The doctor knows I won’t be operated on.
⑤ (表示推测)大概，大约
That would be his father .那大概设他父亲。
You would be about 10 years old then.你那时大概10岁。
It would be about ten when they left.
I thought she would have told you about it.
6.需特别注意：
①may well do sth =be very likely to do sth(很可能，完全能)
may as well do sth = had better do sth
② would like to have done
= would love to have done
= was/were to have done(本来想做…，本来打算做…)
③ had better have done sth(当时已做了…就好了)
④ must have done sth(肯定干过某事)
⑤ can have done sth可能已干过…
can’t have done sth不可能干过…，肯定没干过…
⑥could have done sth本来能够干 …，可能已干过…
⑦ may /might have done sth也许已经干过…，
⑧should have done sth
=ought to have done sth本来应该干…
⑨needn’t have done sth本不必做…
⑩would rather have done sth宁愿干过…
would rather not have done sth宁愿没干过…
好成绩是练出来的：
1.A left –luggage office is a place where bags ____ be left for a short time , especially at a railway station.
A shouldB canC must D will
2.How ___ you say that you really understand the whole story if you have covered only part of the article?
A canB mustC needD may
3.--There’s no light on.
--they ___ be at home.
A can’tB mustn’tC needn’tD shouldn’t
4.Some aspects of a pilots job ___ be boring ,and pilots often ___ work at in convenient hours.
A can, have toB may, canC have to, mayD ought to, must
5.He didn’t agree with me at first, but I ____ persuade him to sign the agreement later.
A couldB mightC ought to Dwas able to
6.If I ____ plan to do anything I wanted to, I’d like to go to Tibet and…
A wouldB couldC had toD ought to
7.The World Web is sometimes jokingly called the World Walt because it ___ be very slow.
A shouldB mustC will D can.
8.—Is Jack on duty today?
--It ___ be him. It’s his turn tomorrow.
A can’tB mustn’tC needn’tD won’t
9.I____ have been more than six years old when the accident happened.
A couldn’tB mustn’tC needn’tD shouldn’t
10.—I have taken someone else’s green sweater by mistake.
--It ___ Harry’s. He always wears green.
A has toB will beC must beD could be
11.You ____ be tired , you have only been working for an hour.
A can’tB mustn’tC may notD won’t
12.—Do you know where David is ?I couldn’t find him anywhere.
-- Well, he ___ have gone far. His coat is still here.
A can’tB mustn’tC may notD won’t
13.—Can I pay the bill by check?
-- Sorry, sir. But it is the payment shall be made in cash.
A shallB mustC will D can.
14.—Could I have a word with you, mum?
-- Oh, dear, if you ____.
A shouldB mustC may D can.
15.Naturally, after I told her what to do, my daughter ___ go and do the opposite.
A shouldB mustC may D can.
16.—Who is the girl standing over there?
--Well, if you ___ know, her name is Mabel.
A shallB mustC may D can.
17.John, look at the time.___ you play the piano at such a late hour?
A NeedB MustC May D Can.
18._____ you need any help, you can phone me at the office.
A WouldB ShouldC CouldD Had
19.—I’m afraid I will be too busy to go with you.
--Well, I’ll keep a seat for you in case you ___ change your mind.
A shouldB mayC will D can.
20.If anything __ happen to me, please give this letter to my head teacher.
A couldB mustC wouldD should
21.There is a real possibility that these animals could be frightened, ____ a sudden loud noise.
A being thereB should there beC there wasD there having been
22.—When can I come for the photos? I need them tomorrow afternoon.
-- They ___ be ready by 12:00.
A shouldB mightC need D can.
23.It’s nearly seven o’clock. Jack ___ be here at any moment.
A shouldB mustC need D can.
班级________姓名_____________
1-5 ___________________2-10___________________11-15_________________
16-20__________________21-23_______
第二篇：高中英语情态动词语法题
高中英语情态动词练习题
第一组题
1. I was really anxious about you. You______ home without a word.
A. mustn’t leaveB. shouldn’t have leftC. couldn’t have leftD. needn’t leave
2. ----Is John coming by train?
----He should, but he ________ not. He likes driving his car.
A. mustB. canC. needD. may
3. A left-luggage office is a place where bags _______ be left for a short time, especially at a railway station.
A. shouldB. canC. mustD. will
4. ----Isn’t that Ann’s husband over there?
----No, it _______ be him -----I’m sure he doesn’t wear glasses.
A. can’tB. must notC. won’tD. may not
5. You ________ be tired -----you’ve only been working for an hour.
A. must notB. won’tC can’tD. may not
6, I often see lights in that empty house. Do you think I _______ report it to the police?
A. shouldB. mayC. willD. can
7. Mr. White _________ at 8:30 for the meeting, but he didn’t show up.
A. should have arrivedB. should arrive
C. should have had arrivedD. should be arriving
8. ----Tom graduated from college at a very young age.
----Oh, he ________ have been a very smart boy then.
A. couldB. shouldC. mightD. must
9. ----Who is the girl standing over there?
----Well, if you ________ know, her name is Mabel.
A. mayB. canC. mustD. shall
10. Children under 12 years of age in that country ________ be under adult supervision when in a public library.
A mustB. mayC. canD. need
11. “The interest ________ be divided into five parts, according to the agreement made by both sides,” declared the judge.
A. mayB. shouldC. mustD shall
12. ----I don’t mind telling you what I know.
----You _______. I’m not asking you for it.
A. mustn’tB. may notC. can’tD needn’t
13. I _______ pay Tracy a visit, but I’m not sure whether I will have time this Sunday.
A shouldB. mightC. wouldD. could
14. ----I’ll tell Mary about her new job tomorrow.
----You _________ her last week.
A. ought to tellB. would have toldC. must tellD. should have told
15. ----Excuse me. Is this the right way to the Summer Palace?
----Sorry, I am not sure. But it _______ be.
A mightB. willC. mustD. can
16. ----Excuse me, but I want to use your computer to type a report.
----You _________ have my computer if you don’t take care of it.
A shan’tB. might notC. needn’tD. shouldn’t
17. ----Mum, I’ve been studying English since 8 o’clock. _______ I go out and play with Tom for a while?
----No, I am afraid not. Besides, it’s raining outside now.
A Can’tB. Wouldn’tC. May notD. Won’t
18. Tom, you _______ leave all your clothes on the floor like this!
A. wouldn’tB mustn’tC. needn’tD. may not
19. John, look at the time. ________ you play the piano at such a late hour?
A MustB. CanC. MayD. Need
20. I ________ have been more than six years old when the accident happened.
A. shouldn’tB couldn’tC. mustn’tD. needn’t
第二组题
1. He ________ have completed his work; otherwise, he wouldn’t be enjoying himself by the seaside.
A. shouldB mustC. wouldn’tD. can’t
2. There _________ be any difficulty about passing the road test since you have practiced a lot in the driving school.
A. mustn’tB. shan’tCshouldn’tD. needn’t
3. ----I’ve taken someone else’s green sweater by mistake.
----It ______ Harry’s. He always wears green.
A could beB. will beC. mustn’t beD. has to be
4. He paid for a seat, when he _________ have entered free.
A couldB. wouldC. mustD. need
5. ----The woman biologist stayed in Africa studying wild animals for 13 years before she returned.
----Oh, dear! She ________a lot of difficulties!
A. may go throughB. might go through
C. ought to have gone throughDmust have gone through
6. The World Wide Web is sometimes jokingly called the World Wide Wait because it _____ be very slow.
A. shouldB. mustC. willD . can
7. ----Catherine, I have cleaned the room for you.
----Thanks. You ________ it. I could manage it myself.
A. needn’t doBneedn’t have doneC. mustn’t doD. shouldn’t have done
8. This cake is very sweet. You ________ a lot of sugar in it.
A. should putB. could have putC. might putD . must have put
9. ----Tom is never late for work. Why is he absent today?
----Something _________ to him.
A. must happenB. should have happened
C. could have happenedD must have happened
10. ----Do you know where David is ? I couldn’t find him anywhere.
----Well. He _______ have gone far----his coat’s still here.
A. shouldn’tB. mustn’tC can’tD. wouldn’t
11. ----Lucy doesn’t mind lending you her dictionary.
----She _________. I’ve already borrowed one.
A. can’tB. mustn’tC. needn’tD. shouldn’t
12. Helen ________ go on the trip with us, but she isn’t quite sure yet.
A. shallB. mustC . mayD. can
13. There’s no light on ----they ________ be at home.
A can’tB. mustn’tC. needn’tD. shouldn’t
14. We hope that as many people as possible _________ join us for the picnic tomorrow.
A. needB. mustC. shouldD. can
15. ----What’s the name?
----Khulaifi. __________ I spell that for you?
AShallB. WouldC. CanD. Might
16. Black holes ________ not be seen directly, so determining the number of them is a tough task.
A. canB. shouldC. mustD. need
17. We _________ have proved great adventurers, but we have done the greatest march ever made in the past ten years.
A. needn’tB. may notC. shouldn’tD. mustn’t
18. ----Mr. Gordon asked me to remind you of the meeting this afternoon. Don’t you forget it!----OK, I _________.
A won’tB. don’tC. willD. do
19. The weather turned out to be fine yesterday. I ______the trouble to carry my umbrella with me.
A. should have takenB. could have taken
C needn’t have takenD. mustn’t have taken
20. ----Could I have a word with you, mum?
----Oh dear, if you ________.
A. canB . mustC. mayD. should
第三组题
1. As you worked late yesterday, you ________ have come this morning.
Aneedn’tB. mayn’tC. can’tD. mustn’t
2. If it were not for the fact that she ______ sing, I would invite her to the party.
A. couldn’tB. shouldn’tCcan’tD. might not
3. The workers will go on strike if the demands they _________put forward are turned down.
A. couldB. wouldC. /D. had
4. ----I think I’ll give Bob a ring.
----You _______. You haven’t been in touch with him for ages.
A. willB. mayC. have toD should
5. ----May I smoke here?
----If you ________, choose a seat in the smoking section.
A. shouldB. couldC. mayDmust
6. ----Must he come to sign this paper himself?
----Yes, he ________.
A. needB mustC. mayD. will
7. Some aspects of a pilot’s job __________ be boring, and pilots often _______ work at inconvenient hours.
A. can ; have toB. may ; canC. have to ; mayD. ought to ; must
8. ----Is Jack on duty today?
----It ______ be him. It’s his turn tomorrow.
A. mustn’tB. won’tCcan’tD. needn’t
9. ----How’s your tour around the North Lake? Is it beautiful?
----It ________ be, but it is now heavily polluted.
A. willB. wouldC shouldD. must
10. In crowded places like airports and railway stations, you ________ take care of your luggage.
A. canB. mayC. mustD. will
11. ----Guess what? I have got A for my term paper.
----Great! You ________ read widely and put a lot of work into it.
A. mustB. shouldC must haveD. should have
12. ----She looks very happy. She ________ have passed the exam.
----I guess so. It’s not difficult after all.
A. shouldB. couldC mustD. might
13. ----What do you think we can do for our aged parents?
----You ________ do anything except to be with them and by yourself.
A. don’t have toB. oughtn’t toC. mustn’tD. can’t
14. ----Turn off the TV, Jack. _________ your homework now?
----Mum, just ten more minutes, please.
A. Should you be doingB. Shouldn’t you be doing
C. Couldn’t you be doingD. Will you be doing
15. My MP4 player isn’t in my bag. Where ______ I have put it?
A. canB. mustC. shouldD. would
16. ----My can’s really fat.
----You ________ have given her so much food.
A. wouldn’tB. couldn’tC. shouldn’tD. mustn’t
17. The biggest problem for most plants, which ________ just get up and run away when threatened, is that animals like to eat them.
A. shan’tB can’tC. needn’tD. mustn’t
18. The teacher ______ have thought Johnson was worth it or she wouldn’t have wasted time on him, I suppose.
A. shouldB. canC. wouldD must
19. ----Where is my dictionary ? I remember I put it here yesterday.
----You _______ it in the wrong place.
A. must putB. should have putC. might putD might have put
20. ----What does the sign over there read?
----“No person _______ smoke or carry a lighted cigarette, cigar or pipe in this area.”
A. willB. mayC. shallD. must
参考答案
第一组
1-5 BDBAC6-10 AADCA11-15 DDADA16-20 AABAB 第二组
1-5 BCAAD6-10 DBDDC 11-15CCADA16-20 ABACA 第三组
1-5 ACCAD 6-10 BACCC11-15 CCABA 16-20 CBDDC
第三篇：高一英语情态动词与虚拟语气
选择题 1.A.can’t
. B.couldn’t
C.may not
D.might not .
D.had been broken D.can’t; shouldn’t
2.A.breaks 3. B.has broken.C.were broken
.
A.won’t; can’tB.mustn’t; may C.shouldn’t; must
4.--Shall I tell John about it?
I’ve told him already. B.wouldn’t
C.mustn’t
D.shouldn’t
A.needn’t5.--Alice, why didn’t you come yesterday?
.
B.would B.would
C.was going to
C.could
D.did get out. D.was able to
A.hadA.had to
6.7.--When can I come for the photos? I need them tomorrow afternoon.
--They________ be ready by 12:00. A.can
B.shouldC.mightD.need
8.Peter_______ come with me tonight, but he’s not sure yet.
A.mustB.mayC.canD.will 9.--Will you stay for lunch?
--Sorry,________.My brother is coming to see me. A.I mustn’t
B.I can’t
C.I needn’t
D.I won’t
10.--Are you coming to Jeff’s party?
--I’m not sure.I_______ go to the concert instead. A.must
B.would
C.should
D.might
11.The two strangers talked as if they _______ friends for years.
—1—
A.should be
-- Of course. B.would beC.have beenD.had been 12.-- The room is so dirty, ________we clean it?
A.WillB.Shall
A.needn’tC.WouldD.Do 13.Michael_______ be a policeman, for he’s much too short. B.can’tC.shouldD.may
14.--Could I call you by your first name?
--Yes, you________.
A.willB.could
license________ take an eye test.
A.canB.mustC.wouldD.may
D.should C.mayD.might 15.According to the local regulations, anyone who intends to get a driver’s 16.I should have been there, but I ______not find the time. A.wouldB.couldC.might
17.--Write to me when you get home.--_______.
D.I can A.I mustB.I shouldC.I will
ceremony? 18.Mr Bush is on time for everything.How ________it be that he was late for the opening
A.canB.shouldC.mayD.must
19.You can’t imagine that a well-behaved gentleman_______be so rude to a lady.
A.mightB.needC.shouldD.would
20.--I hear you’ve got a set of valuable Australian coins._________I have a look? --Yes, certainly.
A.DoB.MayC.ShallD.Should
21.--Is John coming by train?
--He should, but he________not.He likes driving his car.
A.mustB.canC.need
papers have been collected.
—2— D.may 22.It has been announced that candidates_________remain in their seats until all the
A.canB.willC.mayD.shall
23.Naturally, after I told her what to do, my daughter_______ go and do the opposite !
A.mayB.canC.mustD.should
24.--I hear they went skiing in the mountains last winter.
--It_______ true because there was little snow there.
A.may not beB.won’t beC.couldn’t beD.mustn’t be
25.A left-luggage office is a place where bags__________ be left for a short time, especially at a railway station.
A.shouldB.canC.mustD.will
26.How_________ you say that you really understand the whole story if you have covered only part of the article?
A.canB.mustC.needD.may
27.--Who is the girl standing over there?
--Well, if you______ know, her name is Mabel.
A.mayB.canC.mustD.shall
28."The interest_________ be divided into five parts, according to the agreement made by both sides," declared the judge.
A.mayB.shouldC.mustD.shall
29.--I don’t mind telling you what I know.
--You_________. I’m not asking you for it.
A.mustn’tB.may notC.can’tD.needn’t
30.I________ pay Tracy a visit, but I am not sure whether I will have time this Sunday.
A.shouldB.mightC.wouldD.could
31.I often see lights in that empty house.Do you think I_______ report it to the police?
A.shouldB.mayC.willD.can
32.-- Excuse me, but I want to use your computer to type a report.
-- You________ have my computer if you don’t take care of it.
A.shan’tB.might notC.needn’tD.shouldn’t
33.--Excuse me .Is this the right way to the Summer Palace?
—3—
--Sorry, I am not sure.But it________be.
A.mightB.willC.mustD.can
34.--Mum , I’ve been studying English since 8 o’clock._________ I go out and play with Tom for a while.
--No, I’m afraid not .Besides , it’s raining outside now .
A.Can’tB.Wouldn’tC.May notD.Won’t
35.Children under 12 years of age in that country________be under adult supervision when in a public library.
A.mustB.mayC.canD.need
36.--Isn’t that Ann’s husband over there?
--No, it__________be him--I’m sure he doesn’t wear glasses.
A.can’tB.must notC.won’tD.may not
37.You ________ be tired--you’ve only been working for an hour.
A.must notB.won ’t beC.can’tD.may not
38.--Tom graduated from college at a very young age.
--Oh, he________have been a very smart boy then.
A.couldB.shouldC.mightD.must
39.You might just as well tell the manufacturer that male customers ______ not like the design of the furniture.
A.mustB.shallC.mayD.need
40.Tom, you___________leave all your clothes on the floor like this!
A.wouldn’tB.mustn’tC.needn’tD.may not
D.Need 41.John, look at the time.___________you play the piano at such a late hour?A.MustB.CanC.May
it________ be very slow.
A.shouldB.mustC.willD.can 42.The World Wide Web is sometimes jokingly called the World Wide Wait because
43.--Lucy doesn’t mind lending you her dictionary.
-- She_________.I’ve already borrowed one.
—4—
A.can’tB.mustn’tC.needn’tD.shouldn’t
44.--I’ve taken someone else’s green sweater by mistake.
--It_______Harry’s.He always wears green.
A.has to be
A.can’tB.will beC.mustn’t beD.could be 45.You know he is not going to let us leave early if we_______get the work done. B.may notC.shouldn’tD.mustn’t
46.--What’s the name?
--Khulaifi.________I spell that for you?
A.Shall
A.can’tB.WouldC.CanD.Might 47.There’s no light on--they_______be at home. B.mustn’tC.needn’tD.shouldn’t
48.--Mr Gordon asked me to remind you of the meeting this afternoon.Don’t you forget it !
--OK, I_________.
A.won’tB.don’tC.willD.do
49.--Is Jack on duty today?
--It_________be him.It’s his turn tomorrow.
A.mustn’tB.won’tC.can’tD.needn’t
50.--I think I’11 give Bob a ring.
--You________.You haven’t been in touch with him for ages.
A.will
A.needB.mayB.mustC.have toC.shouldD.shouldD.can 51.We hope that as many people as possible_________join us for the picnic tomorrow.
52.Some aspects of a pilot’s job________be boring, and pilots often___________work at inconvenient hours.
A.can; have to
C.have to; may
53.--May I smoke here?
--If you________, choose a seat in the smoking section.
—5—B.may; can D.ought to; must
A.should
A.can
tough task.B.couldC.mayD.must 54.--Could I have a word with you, mum?B.must--Oh dear, if you______. C.mayD.should 55.Black holes ________ not be seen directly,so determining the number of them is a
A.canB.shouldC.mustD.need
56.-- How’s your tour around the North Lake? Is it beautiful?
-- It_________be, but it is now heavily polluted.
A.willB.wouldC.shouldD.must
57.In crowded places like airports and railway stations, you_______take care of your luggage.
A.canB.mayC.mustD.will
58.My MP4 player isn’t in my bag.Where _________ I have put it?
A.canB.mustC.shouldD.would
59.As a result of the serious flood, two -thirds of the buildings in the area________.
A.need repairing
C.needs repairingB.needs to repairD.need to repair
60.The boss has given everyone a special holiday, so we________go to work tomorrow.
A.can’tB.mustn’tC.needn’tD.shouldn’t
61.- What does the sign over there read?
--“No person_______smoke or carry a lighted cigarette, cigar or pipe in this area.”
A.willB.mayC.shallD.must
62.--What do you think we can do for our aged parents?
--You___________do anything except to be with them and be yourself.
A.don’t have toB.oughtn’t toC.mustn’tD.can’t
63.--Turn off the TV, Jack._________your homework now?
--Mum, just ten more minutes, please.
A.Should you be doing
B.Shouldn’t you be doing D.Will you be doing C.Couldn’t you be doing
—6—
第四篇：情态动词只有情态意义
情态动词只有情态意义，即它所表示的是说话人对动作的观点，如需要、可能、意愿或怀疑等。
情态动词的特征：
1.在形式上，情态动词没有实义动词的各种变化。
2.在意义上，大多数情态动词有多个意义。
3.在用法上，情态动词与助动词一样，须后接动词原形。
情态动词各自的基本意义及用法
一、can 与could用法对比表
对比点 can could
1、表“能力” Can you lift this heavy box? I couldn’t understand what he said at all.
2、表“许可” You can use a different material instead. He said I could borrow his bike.
3、“怀疑” No, no, it can’t be true.
What on earth can this mean? We thought the story could not be true. How could you be so careless?
4、can与be able to 区别 1. could代替 can，表示语气更为婉转。
Eg. Could I use your bike? Yes, you can.
2. can (能够)=be able to(仅表能力时)，但be able to 表示一番努力后，才能做得到，且有更多的时态。
He was a good swimmer, so he __________ swim to the river bank when the boat sank.
A. could B. might C. shall D. was able to
二、may与 might用法对比表
对比点 may Might
1.表“询问” May I „?(=Can I „?) Might I „?(=Could I„?)(但比用may 更客气) 1
2.表“允许” You may take the boy there. He told me he might come .(might 与told相呼应)
3.表“可能”“或许” She may nor like this place. I’m afraid he might not like this play.
注： 1. May I„?的答语。
2.may可表示期望或祝愿
May you succeed !
3.may (might)用于目的状语从句中 肯定：Yes, you may.
否定：No, you mustn’t 不行(语气强硬)
No, you may not 或No, you’d better not.
The emperor gave them some gold in order that they might begin their work at once.
三、must与have to的用法对比表
对比点 must have to
1.表“必须” (主观看法)必须;没有过去式，可用于间接引语中。He told me I must do according to what he said. (客观需要)不得不，有多种时态。It’s raining heavily, we can’t go now.
2.疑问句 Must I „?
Yes, you must.(一定)
No, you needn’t./ you don’t have to.(不必) Do you have to go today?
Yes, we do.
否定句：You don’t have to worry about that.
四、need与dare的用法对比表
对比点 need dare
1.情态动词+动词原形
1)否定式
2)疑问式 He need not (needn’t)go.
----Need we do it again?
---No, you needn’t do it again. He dare not say so. 2
Dare she go out alone at night?
How dare you say I’m unfair?
If he dare do that, he’ll be punished.(条件句)
I dare say.(固定用法)
2.行为动词+带to不定式
1)肯定式
2)否定式
3)疑问式 He needs to go.
He doesn’t (does not)need to go.
Does he need to do it again?
No, he doesn’t need ot do it again. He dares to say.
He does not(doesn’t)dare to say.
If you dare to jump into the water from here, so dare I .
3. did not need to do
表示过去没有必要做 She didn’t need to attend the meeting yesterday, and she stayed with her children.(她没有参加)
五、should与ought to用法对比表
对比点 should ought to
1、表“应该” 表劝告、建议
You should listen to the doctor’s advice.
We should learn from Zhang Hua 表示“有责任有必要”做某事
You ought to finish your work before you go home.
We ought to help each other.
2、表“估计”
They should get home by now. 表示“非常可能”的事，可译为“总应该”
If we start to work right now, we ought to finish it before lunch.(午饭前应当能干完)
注： 1)、should还可在虚拟语气中的使用
2). 注意：ought to的疑问式及否定式
----Ought he to go? ----Yes, I think he ought to.
No, he oughtn’t to.
否定式：ought not to a或oughtn’t to do(不说ought to not do)
反疑问句：oughtn’t ______?
六、shall与will的用法对比表
shall Will
1. 征询对方意见或请求指示，用于第
一、三人称：
Shall I (we)„?
Shall he (she)„? Where shall I (we)wait for you? 1. 询问对方的意思或向对方提出要求：
Will you(please)„? Won’t you„?
Would you like to„?(用would替代will更客气)
----Won’t you go and see the film?你不去看电影吗?---Yes, I think I will. 不， 我想去。
2. 表示说话人的“意愿”有“命令”“警告”“强制”“允诺”“决心”等，用于第
二、三人称，要重读。
You shall do what I tell you ( to do).
我叫你干什么你就干什么。
Everything shall be done to save the ship.
一定要竭尽全力来拯救这艘船。 表示“意志”“意愿”，用于各种人称：
I won’t do anything you don’t like.
我不会做任何你不喜欢的事。
Would表示过去时间的“意志”“意愿”
Shylock would not take the money earlier.
夏洛克先前是不肯要钱的。
七：used to与would用法对比表
used to would
1.表示过去的动作、状态，重在与现在情况的对比，不一定要有时间状语。
I used to play cards a lot, but now I seldom play. 4
My hometown is not what it used to be. 1.只表示过去动作的重复，有明确的时间状语
I would go to see my grandfather on Sunday when he was in the middle school.
2.would 后只接表动作的动词，不接表认识或状态动词
He used to be nervous in the exam.
2.表示过去的习惯有时可互换：
When we were very young, we used to / would go skating every winter.
2. 表示过去的次数时，不能使用：
( √)We went to the Great Wall five times when we were young.
( X ) We used to go / would go to the Great Wall five times when we were young.
注：used to do的否定式：usedn’t to do 或didn’t use to do (usedn’t也可写作usen’t)
疑问式： Did you use to do ? Didn’t you use to do?
Used you to do? Usedn’t you to do?
情态动词表推测
情态动词表推测的意义：
1、大多数情态动词(除表‘能力、许可、意志’外)，都可以表示推测，其程度有差异。按其可能性程度的高低排列为： Must ﹥will ﹥would ﹥ought to ﹥ should ﹥ can ﹥ could﹥ may ﹥ might
肯定 完全可能 很可能 可能 有可能
2.注意区分情态动词的否定的含义：
may not或许不、可能不 might not可能不 can’t 不可能
mustn’t不许、禁止 shouldn’t不应该 needn’t 不必
3.情态动词表推测具体运用：情态动词可以对现在、进行、过去推测
S主+情态动词+be+adj 对“性质”“特征”的推测
S主+情态动词+be+n 对“职业”“事物”的推测
S主+情态动词+V原 对经常性行为的推测
S主+情态动词+be+V-ing 对进行着的行为的推测
S主+情态动词+have+PP 对过去的行为的推测
特别提醒：情态动词表推测时
1、 can只能用于否定句和疑问句
2、 must只能用于肯定句(它的否定句和疑问句其实就用can来代替了)
3、 如句中有情态动词 + 完成时，定是对过去的推测 。
4、 句中如有表示不肯定的话语，如：I am not sure; I don’t know 之类，常选may /might的各种形式
4. 记住下面几组表示反劝的特殊的表推测的形式
1). could + have + PP表示本来能做到，但事实上没有做到。 He could have finished the task on time, but the heavy snow came.
2). couldn’t +have + PP表示本来不能做到，但已经做到了。 She could not have covered the whole distance, but in fact she arrived ahead of time.
3) needn’t + have + pp表示本不必做的，但已经做到了。 She needn’t have attended the meeting yesterday, but she did.
4.) should/ought to +have + PP表示 该做而没有做 The plant is dead. I should/ought to have given ot more water.
5) shouldn’t/ oughtn’t to +have + PP表示 不该做而做了。 You oughtn’t to / shouldn’t have taken her bike without permission.
5. 记住下面对比：
must只能用于肯定句(它的否定句和疑问句其实就用can来代替了)
1.must + have + PP 表示对过去肯定的推测，译为“一定是，准是” The road is wet. It must have rained yesterday.
2.can + have + PP 表示对过去的推测(限于问句中) Can she have said so? 他可能这样说吗?
3.can’t + have + PP 表示对过去的否定推测 He cannot have said such a foolish thing.
情态动词表推测的反意疑问句
情态动词表推测的反意疑问句，简单来说，就是以情态动词后的时态为淮，如句子里有明确的时间状语，则以其为准。以 must 为例：
eg. 1. You must be hungry now, aren’t you?
2. He must be watching TV , isn’t he ?
3 Tom must have lived her for a long time, hasn’t he ?
4. She must have arrived yesterday, didn’t she?
注：如选择题中(以She must have arrived yesterday, didn’t she?为例)既有didn’t she又有hasn’t she则以didn’t she?为最佳答案
第五篇：情态动词教案
情态动词
1. 概念: 情态动词: 表示说话者的某些观点或态度的词语.如 “能” , “或许” , “必须” , “需要” , “应该” 等. 2. 情态动词主要有: can, may, must, need, should, … 这些情态动词后面 + 动词原形. 3. 用法
① can ⑴ 表示能力,意为”能, 会”. 如:
eg: I can play basketball. 我会打篮球.
---Can you play basketball ? 你会打篮球吗? --- Yes, I can. / No, I can’t. 是的, 我会. / 不, 我不会.
⑵ 表示怀疑、猜测，常用 be 连用, 放在否定句和疑问句中。如：
eg: He can’t be in the room. 他一定不在房间里.
⑶ 表示请求或允许, 多用于口语中, 意为”可以”, 相当于 may. 如:
eg: You can go now. 你现在可以走了.
② could ⑴ 是can 的过去式, 表示过去的能力. 如:
eg: I could swim when I was a child. 当我还是一个小孩子的时候我就会游泳了.
⑵ couldn’t: “不能” 用could 提问肯定和否定回答分别用 could, 和 couldn’t.
如:
eg: --- Could you skate last year? 你去年会滑冰吗?
--- Yes, I could. / No, I couldn’t. 是的, 我会. / 不, 我不会.
③ may ⑴ 表示推测, 意为“可能; 或许” 用于肯定句中.
eg: He may be a teacher. 他或许是一个老师.
⑵ 表示请求、许可， 意为”可以” 如: eg: ---May I borrow your book? 我可以借你的书吗?
--- Yes, you can. / No, you mustn’t. 是的, 可以. / 不, 你你禁止借书. 注意: 当由may 来提问的时候, 肯定回答我们用Yes, you can. 否定回答用 No, you mustn’t. ④ must ⑴ 表示“必须、应该“;
eg: You must do your homework. 你必须做作业.
⑵ 表示推测, “一定” 常与be 动词连用. eg: He must be in the classroom. 他一定在教室.
⑶ must + not = mustn’t 禁止
eg: You mustn’t smoke. 禁止吸烟.
⑷ must 放于句首提问, 肯定回答Yes, you must. 否定回答 No, you needn’t.
⑸ must 与 have to 的区别：
must强调主观的看法.
have to 强调的是客观因素. eg: I must do my homework. 我必须做作业.(个人看法)
I have to go home now, because my mother is ill. 我不得不回家，因为我妈妈病了.(客观原因所导致)
⑤ need ⑴ 作情态动词使用后跟动词原形. You needn’t come here so early.
⑵ 作实义动词使用后接to do, He needs to drink some water. 他需要喝些水. 变否定句: He doesn’t need to drink any water.
变疑问句: Does he need to drink any water? Yes, he does. / No, he doesn’t.
⑥ should “应该” 一般指应尽的某种义务.
eg: As a student, we should finish our homework. 作为一个学生，我们应该完成作业.
练习：
(
) 1. Mr Wang ______ be in Nanjing now, he went to Beijing only this morning.
A. mustn’t
B. may not
C. can’t
D. needn’t (
) 2. –Must I saty at home, Mum?
--No, you ______.
A. needn’t
B. mustn’t
C. don’t
D. may not (
) 3. –Can you go swimming with us this afternoon?
--Sorry, I can’t. I _____ take care of my little sister at home because my mother is ill.
A. can
B. may
C. would
D. have to (
) 4. –May I go to the cinema, Mum? --Certainly. But you ______ be back by 11 o’clock.
A. can
B. may
C. must
D. need (
) 5. To make our city more beautiful, rubbish ______ into the river.
A. needn’t be thrown
B. mustn’t be thrown
C. can’t throw
D. may not throw (
) 6. –May I go out to play basketball, Dad? --No, you ______. You must finish your homework first. A. mustn’t
B. may not
C. couldn’t
D. needn’t (
) 7. –Where is Jack, please ?
--He _____ be in the reading room. A. can
B. need
C. would
D. must (
) 8. –Who is the man over there? Is it Mr Li?
--No, it ______ be him. Mr Li is much taller. A. musn’t
B. may not
C. can’t
D. needn’t
(
) 9. These books ______ out of the reading room. You have to read them here.
A. can’t take
B. must be taken
C. can take
D. mustn’t be taken (
) 10. –Mum, may I watch TV now?
--Sure, but you ______ help me with my housework first.
A. can
B. may
C. must
D. could (
) 11. The boy said he had to speak English in class, but he ______ speak it after calss.
A. could
B. didn’t have to
C. might
D. shouldn’t (
) 12. –Must we hand in the papers now?
--No, you ______.
A. can’t
B. may not
C. mustn’t
D. needn’t (
) 13. John ______ go there with us tonight, but he isn’t very sure about it.
A. must
B. can
C. will
D. may (
) 14. Even the top students in our class can’t work out this problem. So it ______ be very difficult.
A. can
B. may
C. must
D. need (
) 15. Put on more clothes. You ______ be feeling cold with only a shirt on.
A. can
B. could
C. would
D. must (
) 16. It’s still early. You ______.
A. mustn’t hurry
B. wouldn’t hurry
C. may not hurry
D. don’t have to hurry (
) 17. –May I stop here?
--No, you ______.
A. mustn’t
B. might not
C. needn’t
D. won’t (
) 18. A computer ______ think for itself, it must be told what to do.
A. can’t
B. couldn’t
C. may not
D. might not (
) 19. –Could I borrow your dictionary?
-- Yes, of course you _______.
A. might
B. will
C. can
D. should (
) 20. Peter ______ come with us tonight, but he isn’t very sure yet.
A. must
B. may
C. can
D. will (
) 21. Michael ______ be a policeman, for he’s much too short.
A. needn’t
B. can’t
C. should
D. may (
) 22. ______ I know your name?
A. May
B. Will
C. Shall
D. Must (
) 23. You ______ be more careful next time.
A. have to
B. may
C. must
D. might (
) 24. You ______ miss the lesson, though we ______ have it on Thursday.
A. mustn’t; needn’t
B. needn’t; mustn’t
C. mustn’t; mustn’t
D. needn’t; needn’t (
) 25. This pen looks like mine, yet it isn’t. whose ______ it be?
A. must
B. may
C. would
D. can (
) 26. What kinds of homes will we live in the future? Nobody ______ be sure, but scientists are working out new ideas now.
A. will
B. may
C. can
D. must (
) 27. I ______ like to know where you were born.
A. shall
B. should
C. do
D. may (
) 28. ______ you be happy!
A. Might
B. Must
C. Wish
D. May (
) 29. A teacher ______ do every exercise, but a student must.
A. may not
B. needn’t
C. can’t
D. mustn’t (
) 30. The matter ______ be changed into a gas, but it _______ be heated to its boiling point.
A. may; needn’t
B. may; can
C. mustn’t; needn’t
D. can; must (
) 31. Teachers and students ______ look coldly at you for a day or two, but there are friendly feelings in their hearts.
A. must
B. can
C. may
D. should (
) 32. Cars and buses ______ stop when the traffic lights turn red.
A. can
B. need
C. may
D. must (
) 33. –Do you think his story ______ true? --I don’ think so. But it sounds good.
A. must be
B. may be
C. can be
D. has to be (
) 34. Look out! The knife is very sharp. You ______ cut your finger.
A. need
B. must
C. should
D. may (
) 35. –How long ______ the book be kept?
--For two weeks, but you ______ return it on time.
A. can; may
B. may; need
C. can; must
D. must; need (
) 36. – May I have an apple, Mum?
--Certainly. But you ______ wash your hands first?
A. may
B. must
C. can
D. need (
) 37. –There is a lot of smoke coming out of the teaching building there.
--Really? It ______ be a fire, most probably.
A. can
B. ought to
C. may
D. must (
) 38. –Shall I tell John about the bad news?
--No, you ______. I think that will make him sad.
A. needn’t
B. wouldn’t
C. shouldn’t
D. mustn’t (
) 39. –Could I call you by your first name?
--Yes, you ______.
A. will
B. could
C. may
D. might (
) 40. –Let’s go to the cinema, shall we?
-- _______.
A. No, I can’t
B. Yes, I will
C. Yes, thank you
D. No, we’d better not (
) 41. --______ the man over there be our new teacher?
--He ______ be, but I’m not sure.
A. May; mustn’t
B. Can; may
C. Must; can’t
D. Can; can’t (
) 42. –Someone is knocking at the door. Who ______ it be?
--It ______ be Tom. He is still in the school.
A. can; can’t
B. can; mustn’t
C. might; could
D. might; may (
)43. Lily finished _______ the book yesterday.
A. read
B. reading
C. to read
D. reads (
) 44. Susan’s parents have bought a large house with a swimming pool. It _______ be very expensive.
A. must
B. can
C. mustn’t
D. can’t (
) 45. –The room is so dirty. _______ we clean it?
-- Of course.
A. Will
B. Would
C. Do
D. Shall