leave的几种特殊用法
第一篇：leave的几种特殊用法
“there be”句型的几种特殊用法
There be 句型的几种特殊结构及其用法
There be句型是一种应用十分广泛和频繁的句型。但是对there be句型的多变的特点及其特殊结构的复杂性，并不是每个考生都熟悉了解。在大学英语四级考试题中也常常遇到这一句型结构的试题。
例如： Ann never dreams of _________ for her to be sent abroad very soon.(CET-4，1998.6-43) A)there to be a chance B)there being a chance C)there be a chance D)being a chance 该题的答案为B)。
动词 dream of 要求跟 V-ing 分词结构作宾语，更准确地讲是介词of后要求跟 V-ing 分词结构作宾语，there being a chance意为"有一个机会";A)和C)两项均不符合句子结构的要求，所以不是答案选项，而D)项 being a chance 虽然是 V-ing 分词结构，但语义不通，故不能雪
又如： No one had told Smith about ____ a lecture the following day.(CET-4，2001.1-66) A)there beB)there would be C)there wasD)there being 该题的答案为D)。介词 about 后要求跟 V-ing 分词结构作宾语，there being(a lecture)意为"有(一个讲座)"，而A)、B)和C)项内容均不符合结构要求，故不能雪再如：
It is fairly common in Africa for there to be an ensemble of expert musicians surrounded by others who join in by clapping，singing，or somehow adding to the totality of musical sound.(CET-4，1995.1)
该句子中出现了for there to be 的结构，如果按照上一题的解题思路去理解：介词后要求跟 V-ing 分词结构作宾语，那么，这一结构似乎是错的;但是，实际上此结构没有错，此处只能够用 for there to be，而不能用 there being。为什么呢?这就是本文想要解答的问题：there be 句型的特殊结构及其用法。笔者将 there be 句型的几种特殊结构及其用法进行归纳、总结如下，供读者参考。
一、there be句型与各种情态动词连用。 例如： There must be something wrong here.
There might still be some vacant seats in the rear.
There ought to be something with which to fill your stocking.
二、there be句型中的谓语动词be被be likely to be，happen to be，seem(to be)， occur等代替，用来描写事物。例如： ] There are likely to be more difficulties than they have been prepared for. There happened to be nobody in the room.
There doesn’t seem to be much hope of our beating that team .
There seems no doubt that the general character of the landscape，the relative length of day and night，and the climate must all play a big part in determining what kind of people we are. There have occurred many great changes since we met last.
三、there be 句型中的谓语动词be被一些不及物动词代替，如 live，stand，exist，remain等，用来表示"静止、存在、有"。例如：
There lives a family of five in the village. There remains nothing more to be done.
There stands the Monument to the People’s Heroes at the center of the Tian’anmen Square. There exist different opinions on this question.
四、there be 句型中的谓语动词be被一些不及物动词代替，如 come，spring up，appear，emerge，arrive，enter，follow, 等，用来表示"突然出现"。例如：
- 1
结构的逻辑主语。
又如：
There having been a strong suspicion against the ability of the director，the department asked him to resign.("there being +宾格词"作原因状语)
There being nothing to be done，they have to go back home.("there being +宾格词"作原因状语)
There being no further business，the chairm an closed the meeting.("there being +宾格词"作原因状语)
3."there being +宾格词"在句中作主 语。例如：
There being a bus stop so near the house is a great advantage.
"there being +宾格词"结构在句中作主语，句中的宾格词a bus stop作"there being" V-ing分词短语结构的逻辑主语。
七、there be 句型中 be 用 be +V-ed 分词，形成"there be +V-ed分词+宾格词"结构，表示"有"或"存在(某种情况)"，在"there be +V-ed 分词+宾格词"的结构中，主语是宾格词。例如： There was found a lot of food in the kitchen cupboard.
There are now published millions of books every year in China. There was shown at the exhibition an electronic computer made in Shanghai.
八、"there be no +主语名词"的习惯用法。
1.V-ing分词在"there be no"结构中作主语，表示"不可能"、"无法"。例如： There is no denying the fact that China is still a developing country. There is no joking about such matters.
There is no telling what will happen to him next.
2.there is no point +V-ing分词，表示"没有必要"，"无用"，"没有意义"，"没有用处"。例如： We are disappointed with the new officer elected in our bridge club，but thereis no point worrying about it.
3.there is no use +V-ing分词，表示"无用"，"没有意义"，"没有用处"。例如： There is no use advising him to give up smoking.
4.there is no good +V-ing分词，表示"无用"，"没有意义"，"没有用处"，"没有益处"。例如： There is no good discussing the matter with such a fool.
九、在由"there be +主语名词"引起的句子中，修饰主语的情况。
1.在由"there be +主语名词"引起的句子中，用来修饰主语的不定式可以用被动形式，也可以用主动形式。例如：
There is no time to lose /to be lost.
There are still many things to take care of /to be taken care of. 在口语中多用主动形式。但是有时候两种形式可能表示不同的意思。试比较：
There is nothing to do now.(We have nothing to do now.) There is nothing to be done now.(We can do nothing now.) There is nothing to see(nothing worth seeing). There is nothing to be seen(nothing there at all).
2.在由"there be +主语名词"引起的句子中，用来修饰主语的分词或分词短语在意思上相当于一个定语从句。例如：
There were 200children studying(=who were studying)music，dancing，or dramatics. Is there anything planned(=that has been planned)for tonight?
第二篇：【原】android 中定时器的几种用法总结
在android中，經常用到的定時器主要有以下幾種實現：
一、採用Handler與線程的sleep(long )方法
二、採用Handler的postDelayed(Runnable, long) 方法
三、採用Handler與timer及TimerTask結合的方法。
下面逐一介紹：
一、採用Handle與線程的sleep(long )方法
Handler主要用來處理接受到的消息。這只是最主要的方法，當然Handler裡還有其他的方法供實現，有興趣的可以去查API，這裡不過多解釋。
1.定義一個Handler類，用於處理接受到的Message.
Handler handler = new Handler() {
};
2.新建一個實現Runnable接口的線程類。如下：
public class MyThread implements Runnable{} @Override public void run() {} // TODO Auto-generated method stub while (true) {} try {} Thread.sleep(10000);//線程暫停10秒，單位毫秒 Message message=new Message(); message.what=1; handler.sendMessage(message);//發送消息 // TODO Auto-generated catch block e.printStackTrace(); public void handleMessage(Message msg) {} //要做的事情 super.handleMessage(msg); } catch (InterruptedException e) {
3.在需要啟動線程的地方加入下面語句：
new Thread(new MyThread()).start();
4.啟動線程後，線程每10s發送一次消息。
二、採用Handler的postDelayed(Runnable, long) 方法
這個實現比較簡單一些：
1.Handler handler=new Handler();
Runnable runnable=new Runnable(){}; @Override public void run() {} // TODO Auto-generated method stub //要做的事情 handler.postDelayed(this, 2000);
2.啟動計時器：
handler.postDelayed(runnable, 2000);//每兩秒執行一次runnable.
3.停止計時器：
handler.removeCallbacks(runnable);
三、採用Handler與timer及TimerTask結合的方法。
1.定義定時器、定時器任務及Handler句柄
private final Timer timer = new Timer(); private TimerTask task; Handler handler = new Handler() {}; @Override public void handleMessage(Message msg) {}// TODO Auto-generated method stub //要做的事情 super.handleMessage(msg);
2.初始化計時器任務。
task = new TimerTask() {
}; @Override public void run() {} // TODO Auto-generated method stub Message message = new Message(); message.what = 1; handler.sendMessage(message);
3.啟動定時器
timer.schedule(task, 2000, 2000);
簡要說一下上面三步提到的一些內容。
1.定時器任務(TimerTask)顧名思義，就是說當定時器到達指定的時間時要做的工作，這裡是想Handler發送一個消息，由Handler類進行處理。
2. java.util.Timer.schedule(TimerTask task, long delay):這個方法是說，dalay/1000秒後執行task.只執行一次。
java.util.Timer.schedule(TimerTask task, long delay, long period)：這個方法是說，delay/1000秒後執行task,然後進過period/1000秒再次執行task，這個用於循環任務，執行無數次，當然，你可以用timer.cancel();取消計時器的執行。
一个网友说到了CountDownTimer这个类，从名字上面大家就可以看出来，记录下载时间。将后台线程的创建和Handler队列封装成为了一个方便的类调用。
查看了一下官方文档，这个类及其简单，只有四个方法，上面都涉及到了onTick，onFinsh、cancel和start。其中前面两个是抽象方法，所以要重写一下。
下面是官方给的一个小例子：
1 new CountdownTimer(30000, 1000) {
2public void onTick(long millisUntilFinished) {
mTextField.setText("seconds remaining: " + millisUntilFinished 3 / 1000);
4}
5public void onFinish() {
6mTextField.setText("done!");
7}
8}.start(); 主要是重写onTick和onFinsh这两个方法，onFinish()中的代码是计时器结束的时候要做的事情;
onTick(Long m)中的代码是你倒计时开始时要做的事情，参数m是直到完成的时间，构造方法MyCount()中的两个参数中，前者是倒计的时间数，后者是倒计每秒中间 的间隔时间，都是以毫秒为单位。例如要倒计时30秒，每秒中间间隔时间是1秒，两个参数可以这样写MyCount(30000,1000)。 将后台线程的创建和Handler队列封装成为了一个方便的类调用。
/**
* Cancel the countdown.
*
* Do not call it from inside CountDownTimer threads
*/
public final void cancel() {
mHandler.removeMessages(MSG);
mCancelled = true;
}
当你想取消的时候使用mc.cancel()方法就行了,但是不能在CountDownTimer線程的內部調用此方法，要在線程外部使用，使用cancel方法取消後，如果再次調用start方法的話倒計時會重新開始。
希望對你有所幫助。請尊重原創，這裡是ljlkings的空間。
第三篇：There be句型的几种特殊结构
There be 句型的几种特殊结构及其用法
Ann never dreams of _________ for her to be sent abroad very soon.
A)there to be a chance B)there being a chance C)there be a chance D)being a chance
该题的答案为B)。 动词 dream of 要求跟 V-ing 分词结构作宾语，更准确地讲是介词of后要求跟 V-ing 分词结构作宾语，there being a chance意为"有一个机会" 又如：No one had told Smith about ____ a lecture the following day. A)there beB)there would be C)there wasD)there being
D)。介词 about 后要求跟 V-ing 分词结构作宾语，there being(a lecture)意为"有(一个讲座)"，
It is fairly common in Africa for there to be an ensemble of expert musicians surrounded by others who join in by clapping，singing，or somehow adding to the totality of musical sound.
该句子中出现了for there to be 的结构，如果按照上一题的解题思路去理解：介词后要求跟 V-ing 分词结构作宾语，那么，这一结构似乎是错的;但是，实际上此结构没有错，这就是本文想要解答的问题：there be 句型的特殊结构及其用法。
一、there be句型与各种情态动词连用。
例如：There must be something wrong here.
There might still be some vacant seats in the rear.
There ought to be something with which to fill your stocking.
二、there be句型中的谓语动词be被be likely to be，happen to be，seem(to be)， occur等代替，用来描写事物。例如：
There are likely to be more difficulties than they have been prepared for.
There happened to be nobody in the room.
There doesn’t seem to be much hope of our beating that team .
There seems no doubt that the general character of the landscape，the relative length of day and night，and the climate must all play a big part in determining what kind of people we are.
There have occurred many great changes since we met last.
三、there be 句型中的谓语动词be被一些不及物动词代替，如 live，stand，exist，remain等，用来表示"静止、存在、有"。例如：
There lives a family of five in the village.
There remains nothing more to be done.
There stands the Monument to the People’s Heroes at the center of the Tian’anmen Square.
There exist different opinions on this question.
四、there be 句型中的谓语动词be被一些不及物动词代替，如 come，spring up，appear，emerge，arrive，enter，follow, 等，用来表示"突然出现"。例如：
There appears to be no substitute for this stuff yet.
第 1 页 共 4 页 There came a company of actors and actresses.
There followed a spirited discussion after class.
五、there be句型中be用不定式，形成"(for)there to be +宾格词"结构，表示"有"或"存在(某种情况)"，在"(for)there to be +宾格词"的结构中，主语是宾格词。这种不定式结构在句中作逻辑宾语、状语和主语。
1."there to be +宾格词"在句中作宾语。例如：
The students expected there to be more reviewing classes before the final exams.
there to be +宾格词"结构在句中作动词expect的宾语，句中的宾格词m ore review- ing classes作"there to be"不定式结构的逻辑主语。特别应该注意的是there后的不定式只能用"to be"的形式，因为这种不定式结构是从"there be"结构转化而来的。又如：
People don’t want there to be anotherwar.
Members like there to be plenty of choice.
It is fairly common in Africa for there to be an ensemble of expert musicians surrounded by others who join in by clapping，singing，or somehow adding to the totality of musical sound.
"there to be +宾格词"结构在句中作介词for的宾语，句中的宾格词an ensemble of expert musicians 作"there to be"不定式结构的逻辑主语。
2."for there to be +宾格词"在句中作状语。例如：
It isn’t cold enough for there to be a frost tonight，so I can leave Jim ’s car out quite safely.("for there to be +宾格词"作结果状语)
特别应该注意的是，"for there to be +宾格词"在句中作状语时必须用介词 for引出 there be 后面的宾格词。又如： For there to be successful communication， there must be attentiveness and involvement in the discussing itself by all present.("for there to be +宾格词"作目的状语) They planned for there to be another meeting.("for there to be +宾格词"作目的状语)
3."there to be +宾格词"在句中作主语。例如：
It’s a great pity for there to be much trouble in the company. 特别应该注意的是，
"for there to be +宾格词"在句中作主语时必须用介词for引出 there be后面的宾格词。又如： It is impossible for there to be any more apples.
For there to be so few people in the streets was unusual.
六、there be句型中be用V -ing分词，形成"(of)there being +宾格词"结构，表示"有"或"存在(某种情况)"，在"(of)there be- ing +宾格词"的结构中，主语是宾格词。
1."there being +宾格词"在句中作宾语。例如：
Have you ever thought of there being so many work units for you to choose on the talent’s meeting?("there being +宾格词"作宾语)
"there being +宾格词"结构在句中作介词of的宾语，句中的宾格词so m any work u- nits作"there being"V-ing分词短语结构的逻辑主语。又如：
No one had told him anything about there being a beautiful story about the lake. John was relying on there being another opportunity.
2."there being +宾格词"在句中作状语。例如：
There being no cause for alarm ，she went back to her bedroom.("there being +宾格词"作原
第 2 页 共 4 页 因状语)
"there being +宾格词"结构在句中作状语，句中的宾格词no cause作"there being" V-ing分词短语结构的逻辑主语。又如：
There having been a strong suspicion against the ability of the director，the department asked him to resign.("there being +宾格词"作原因状语)
There being nothing to be done，they have to go back home.("there being +宾格词"作原因状语)
There being no further business，the chairm an closed the meeting.("there being +宾格词"作原因状语)
3."there being +宾格词"在句中作主 语。例如：
There being a bus stop so near the house is a great advantage.
"there being +宾格词"结构在句中作主语，句中的宾格词a bus stop作"there being" V-ing分词短语结构的逻辑主语。
七、there be 句型中 be 用 be +V-ed 分词，形成"there be +V-ed分词+宾格词"结构，表示"有"或"存在(某种情况)"，在"there be +V-ed 分词+宾格词"的结构中，主语是宾格词。例如：
There was found a lot of food in the kitchen cupboard.
There are now published millions of books every year in China.
There was shown at the exhibition an electronic computer made in Shanghai.
八、"there be no +主语名词"的习惯用法。
1.V-ing分词在"there be no"结构中作主语，表示"不可能"、"无法"。例如：
There is no denying the fact that China is still a developing country.
There is no joking about such matters.
There is no telling what will happen to him next.
2.there is no point +V-ing分词，表示"没有必要"，"无用"，"没有意义"，"没有用处"。例如： We are disappointed with the new officer elected in our bridge club，but there is no point worrying about it.
3.there is no use +V-ing分词，表示"无用"，"没有意义"，"没有用处"。例如：
There is no use advising him to give up smoking.
4.there is no good +V-ing分词，表示"无用"，"没有意义"，"没有用处"，"没有益处"。例如： There is no good discussing the matter with such a fool.
九、在由"there be +主语名词"引起的句子中，修饰主语的情况。
1.在由"there be +主语名词"引起的句子中，用来修饰主语的不定式可以用被动形式，也可以用主动形式。例如：
There is no time to lose /to be lost.
There are still many things to take care of /to be taken care of. 在口语中多用主动形式。但是有时候两种形式可能表示不同的意思。试比较：
There is nothing to do now.(We have nothing to do now.)
There is nothing to be done now.(We can do nothing now.)
There is nothing to see(nothing worth seeing).
There is nothing to be seen(nothing there at all).
第 3 页 共 4 页 2.在由"there be +主语名词"引起的句子中，用来修饰主语的分词或分词短语在意思上相当于一个定语从句。例如：
There were 200children studying(=who were studying)music，dancing，or dramatics.
Is there anything planned(=that has been planned)for tonight?
第 4 页 共 4 页
第四篇：leave用法之我见
在初中阶段，leave 用法有四种，你想知道吗?Ms Gao告诉你，请听好!
1. leave(vt)译“离开”。构成的公式：leave+地点名词eg.
1) We______( leave )school at 5:00 in the afternoon. 我们下午5点放学。
2) They ______ just ______(leave) Tian’anmen Square.他们刚刚离开天安门。
2. leave 与forl连用，leave译“动身”，构成的公式：leave(vi)for+地点名词 译
“动身去某地” eg.
He_______ ________ ________(将动身去)London next week.=He _______ ______ _________London.
3. leave(vt)+sth+表地点的介词短语译“把某物忘在某地”切记：不能用
forget,eg.
I left my English book in the classroom yesterday.昨天我把我的英语书忘在教室里。
4.leave译为“留(保留)”，构成的公式：leave(vt)+sb +sth=leave+sth+to sb把某物留给某人
此时leave叫“双宾语动词”，且leave必须与to搭配。eg.
I left my clothes to him.=I left________ ________ ________.我把衣裳留给了他。
Key:略。
第五篇：It的特殊用法
一、作形式主语
1．（1）It’s + adj.+ to do sth.
It’s important to study English well.
(2 ) It’s + adj. +that…
It’s important/ necessary/ likely/ possible/ certain/…that…
It’s likely that he will win the game.
It’s certain that he will come this afternoon. 2. It’s + v-ed + that…
(1) It’s said/ thought/ believed/ supposed/ reported/ proved/ known…that…
It’s known that the earth travels round the sun.
= As is known to everybody, the earth travels the sun.
= What is known to everybody is that the earth travels the sun. (2) It’s suggested/ advised/ proposed/ requested/ required/ insisted/ commanded/ demanded/ ordered/…that…
It’s suggested that she（should）finish her homework this afternoon. It’s required that I (should) go at once.
3. (1) It’s + 名 +that…
常见的名词有：a pity, a fact, an idea, an honor, no wonder等
It’s a pity that he can’t come to the party.
It’s a fact that he didn’t pass the exam.
It’s a good idea that we’ll go outing.
It’s an honor that I was invited to the meeting.
(It’s)no wonder (that) he always takes the first place in the exams.
(2) It’s + 名 +doing
常见的名词有：use, good
It’s no use crying.
It’s no good crying over spilt milk.
【谚语】牛奶溢了，哭也没用。（覆水难收）
4. It + 动 + that…
常见的动词有：happen, seem, matter 等 It happened that I hadn’t money with me. It seemed that he had known the fact.. Does it matter that he doesn’t come..
二、作形式宾语
1. 用于复合结构，可以用一句话“没克服它”来记忆如下六个动词：make,
consider, feel, find, think, take. He made it clear that he was not interested in English . He considered it a good idea to go outing with me. I feel it a great honor to be invited to speak here. I find it very interesting to study English. I think it no use arguing with her. I took it for granted that he would give me some help.
2. 用于表示喜好的动词：like, dislike, hate, appreciate 等。
I hate it when people talk with their mouths full.
I like it in the autumn when the weather is clear.
I’d appreciate it if you would like to teach me how to use the computer.
三、it 的几个特殊结构
1. make it (1) 表示“成功、做到、赶上”
——The train is to leave in five minutes. ——We will never make it.
2 We can’t make it to the other shore in cold weather. (2) 表示“确定时间”
——When shall we meet? ——Let’s make it next Sunday. 2. as it is (1) 用于句首，表示“事实上”
I thought he would get better, but as it is he is getting worse.
(2) 用于句尾，表示“照原样”
Leave the chair as it is. 3. see (to it) that… 注意、留神、负责、保证
See to it that everything is ready. 4. rely on it that…信任、对。。。。。。有信心
You may rely on it that she won’t be late. 你可以放心，她不会迟到的。
四、it 的几个特殊句型
1. It is/was + 时间状语 + that…
强调句
It was at seven o’clock that I went to work yesterday. 2. (1) It was + 时间点 + when 从句 （一般过去时 ）
(2) It will be + 时间点 + when 从句 （一般现在时） It was 9 o’clock when they arrived at the factory. 【注意】这一句型中的时间只能是表示时间点的名词，前面不能有介词。
It will be July 1 when we meet again. It is on July 1 that we will meet again. 3. (1) It is/has been + 时间段 +since 从句 （一般过去时）
It is/has been three years since he joined the army.
(2) It was + 时间段 + since 从句 （过去完成时）
It was three days since he had fallen ill.
他生病已经有三天了。
【注意】这一句型since 从句中的谓语动词如果是延续性动词，则翻译成“不做某事多久了”。
It is years since I taught in this school.
我离开这所学校已经几年了。
It is years since I worked in that factory.
我不在那个工厂几年了。
It is years since I lived in this city.
我离开这个城市已经几年了。
It is years since I enjoyed myself so much.
我好几年没玩的这样痛快了。
4.（1）It was + 时间段 +before 从句（一般过去时）
It was three days before I knew the result. (2）It will be + 时间段 + before 从句（一般现在时）
It will be three days before I know the result.
【注意】（1）时态要一致，before 从句只有一般现在时和一般过去时两种时态。
（2）翻译成“过多久才/就。。。。。。”
5. (1) It is the first time + that 从句（现在完成时）
It is the first time that I have spoken in public. （2） It was the first time + that 从句（过去完成时）
It was the first time that I had spoken in public. 6． It is (high/about ) time + that从句（一般过去时）
It’s time that I went to work. =It’s time that I should go to work.=It’s time for me to go to work.