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before的特殊用法

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before的特殊用法before在高考的单项选择、完形填空以及短文改错中考的较多，尤其它的特殊用法。

它的特殊用法主要有以下几种：1.用于“It will /won’t be+时间段+before…”句型，表示“….之后才…. ；用不了多久就…；”另外还表示“不到…就…；刚…就…；到…之前”。

It will be two weeks before everything returns to normal . 两周之后一切才恢复正常。

It won’t be long before we meet again .用不了多久我们就会再见面的。

It may be many years before the situation improves .这次状况或许要过很多年才能得到发展。

It was some time before I realized the truth . 过了很长一段时间我才了解到真相。

I will ask you some questions before I give my answer .在我没有作答前，我要先问你几个问题。

We waited a long time before the train arrived .我们等了很久火车才到。

We hadn’t run a mile before he felt tired .我们跑了还不到一英里他就累了。

2.以免，不然, 趁着Lock your bike before it gets stolen .锁好你的车子，以免被偷。

Put that away before it gets broken .把它收拾好，免得砸碎了。

We must take measures to protect endangered wildlife before it is too late .趁还不算太晚，我们必须采取措施保护濒临灭绝的野生动物。

3.宁可，宁愿I’d die before I apologized to them !我宁死也不向他们道歉！I’d shoot myself before I apologized to her . 我宁死也不向她道歉！4.还没来得及…就…Before John stopped her , she ran out . 约翰还没来得及阻止她，她就跑了出去。

Before she could move , she heard a loud noise .which grew to a terrible roar .她还没来得及迈步，就听见一声巨响，接着就是可怕的隆隆轰鸣。

【高考链接】1．He was told that it would be at least three more months ___ he could recover and return to work .A.whenB. beforeC. sinceD. that2.We hadn’t gone very far ____ we had to stop at one of the traffic lights .A. beforeB. untilC. afterD. as soon as3.We enjoyed ourselves so much in the World Park that three hours passed ___ we knew it .A. whenB. untilC. beforeD. after4.It will not be a long time ______ Mr. Brown _____ from abroad .A. before , returnsB. since , has returnedC. before , will returnD. after , will return5.______ will be years ____ we meet again .]A. There , sinceB. There , afterC. It , thatD. It ,before6. We must take measures to protect endangered wildlife ____ it is too late .A. now thatB. as long asC. unlessD. before7. We had to be patient because it ____ some time ____ we got the full results .A. has been , sinceB. had been , untilC. was , afterD. would be , before8.How long is it _____ we last spent the holiday in the country together ?A. untilB. beforeC. sinceD. when9. You should do it _____ it is too late , otherwise you will fail .A. untilB. whenC. beforeD. unless10.--- It’s a long time _____ I saw you last .---- Yes, and what a pity it is now that it will be a long time ____ we see each other again .A. before ,sinceB. since , whenC. since , beforeD. where , before11.— Why didn’t you try your best to get on the bus ?---- I tried to , but _____ I could it , it started moving .until B. when C. before D. after12.Someone called me up in the middle of the night ,but they hung up _____ I could answer the phone .A. as B , since C. until D. before13.He made a mistake , but then he corrected the situation _____ it got worse .A. untilB. whenC. beforeD. as14.Scientists say it may be five or six years ___ it is possible to test this medicine on human patients .A. sinceB. afterC. beforeD. when15.It was evening ___ we reached the little town of Winchester .A. thatB. untilC. sinceD. before16.Several weeks had gone by ___ I realized the painting was missing .A. asB. beforeC. sinceD. when17. ---- How long do you think it will be _____ China sends a manned spaceship to the moon ?------ Perhaps two or three years .A. whenB. untilC. thatD. before18.----- Why didn’t you tell him about the meeting ?----- He rushed out of the room ___ I could say a word .A.beforeB. untilC. whenD. after19.The field research will take Joan and Paul about five months ; it will be a long time _____ we meet them again .A. afterB. beforeC. sinceD. when20.I had been to Beijing long ____ you visited it .A. beforeB. tillC. afterD. when21. It won’t long _____ he joined the job .A. thatB. beforeC. untilD. and22. That was really a splendid evening . It’s years _____ I enjoyed myself so much .A. whenB. thatC. beforeD. since23.A man escaped from the prison last night . It was a long time ____ the guards discovered what had happened .A. beforeB. untilC. sinceD. when24.It is almost five years _____ we saw each other last time .A. beforeB. sinceC. afterD. when25.In those days , she had to be called two or three times ___ she would come to her dinner .A. whenB. beforeC. sinceD. that26.----- Has your father returned from Africa yet ?------ Yes, but he _____ here for only three days before his company sent him to Japan .A. wasB. has beenC. will beD. would be27.Despite the great success of Chang’e-1 ,experts say , it will be at least ten years _____ ourastronauts can land on the moon .A.whileB. beforeC. sinceD. until28.It _____ long before we ____ the result of the experiment .A. will not be ; will knowB. is ; will knowC. will not be ; knowD. is ; know29. ----Have you got the result of the final exam ?----- Not yet .It will be a few days ______ we know the full results b.A. beforeB. afterC. untilD. when30. How long do you think it will be _____ the computer company puts forward a new products ?A.beforeB. sinceC. untilD. that31.It has been 20years ____ I became a teacher .A. beforeB. whenC. sinceD. after32.It will not be a long time _____ Mr. Black _____ back from abroad .A.before ; comesB. since ; has comeC. before ; will comeD. after ; will come1-5 BACAD 6-10 DDCCC 11-15 C DCCD 16-20 BDABA 21-26 BDABBA27.B 28.C 29. A 30. A31. C 32.A。

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before-的一个特殊用法

before-的一个特殊用法

It will be 2 years before we graduate from the middle school. 两年之后，我们才中学毕业。
It was long before he began to do his homework. 过了很长时间，他才开始做作业。
二. 在句式上 主句多久才；否 定结构意义为：不久就……
3. 不等……就 Someone called me up in the middle of the night , but he hung before I could answer the phone. （NMET 2000） 半夜有人给我打电话，但还没等我去接，对方就挂 断了。
一. 在时态上 主句的时态可以是将来时，也可以是过去 时，但从句的时态，要么是一般现在时， 要么是一般过去时，根据具体情况而定。
1. 我姐姐回国已有五年了。（B） 2. 我姐姐是在五年前回国的。（C） 这是一个强调句型，如果还原的话应该是：
My sister returned from abroad 5 years ago. 本句就是针对5 years ago 进行强调而得 来的。 3. 我姐姐于1990年回国。（D） 本句中“it”指时间。再如：
四. 在句型对比上
before 的这一用法与since等词用法很容易混淆， 值得注意。
1. It has been 5 years _B______ my sister
returned from abroad.
2. It is 5 years ago _C____ my sister returned
before 的一个特殊用法
before 的一个特殊用法
1. 之前 Tom’s father had died before he came back. 在汤姆回来之前，他父亲就已经死了。
Before的详细用法总结

Before的详细用法总结

Before的详细用法总结今天给大家带来Before的用法，我们一起来学习吧，下面就和大家分享，来欣赏一下吧。

Before的用法我们最初接触的Before一般是作为介词使用的，一般表示空间上的“在…之前” 。

例如：The tea has been set before her.茶已经摆在她面前了。

Before作为介词时，需要注意的是，一般不用在表示具体时间的词之前。

比如，两年之前，我们用two years ago，而不能说.efore two years.Before作为介词时，有一个特殊用法需要注意，即before long 表示“不久之后”。

例如：Before long he got married.不久之后他就结婚了。

Before作为连词时，一般意为“在…之前”，用来引导时间状语从句。

引导的从句中的动作一般发生在主句动作之后。

Before作为连词时的用法较为复杂，具体要点如下：一、主句用一般现在时/一般将来时,从句用一般现在时。

例如：You should let me explain what I did before you criticize me.在你批评我之前，你应该让我解释一下我做过什么。

二、主句用过去完成时,从句用一般过去时。

一般翻译为“在…之前就… ”。

例如：1.His father had died before he was born.他父亲在他出生之前就已经去世了。

2.She had finished her homework before her mother returned.她在妈妈返回之前就已经把作业完成了。

三、主句用一般过去时,从句用过去完成时。

从句用过去完成时表示一个过去没有完成或没来得及做的、时间顺序在后的动作，常译为“★还没（来得及）…就…★ ”。

例如：1.He rushed out of the office before I had realized what was happening.我还没意识到发生了什么事，他就冲出去了。

before用法

before用法

before⽤法before的⽤法before的⽤法1 作介词A．指时间．在……以前． e.g. It began to rain before midnight .B. 指位置．在……⾯前． e.g. They knelt before the king .C. 指顺序或排列在前⾯． e.g. You name comes before mine on the list .2 作连词A．在……之前． e.g. Did she leave a message before she went ?B．⽤于It + be +时间段+ before ：在……之后才……e.g. It willl be five years before I come back .3 常于情态动词can / could 连⽤：还没来得及……就……e.g. Before I could say a word , she had rushed out of the room掌握before热点⽤法1. prep. 在......以前，强调时间He came to see me the day before yesterday. 他前天来看我了。

2. prep. 在......前⾯，当着......的⾯，向......，强调地点She has to appear before the court. 她必须出庭受审。

3. prep. 在......之前，先于，强调次序Those with babies can get on the bus before others. 带⼩孩的⼈可以先上汽车。

4. prep. 与其......（宁愿）I'd shoot myself before I apologized to him! 我宁死也不向他道歉!5. adv. 以前，强调时间We've seen that film before. 我们以前看过那场电影。

高考英语复习(外语学校内部资料)绝对权威

高考英语复习(外语学校内部资料)绝对权威


• 在动词insist，order, command, advise, suggest, propose， 在动词insist， propose， insist 等表示建议、命令、 demand, require, request, ask 等表示建议、命令、要求的名词性从句 中谓语动词要用虚拟语气。基本句型：主语+ 动词原形。 中谓语动词要用虚拟语气。基本句型：主语+ (should) + 动词原形。另外像 recommend等也要接(should)+动词原形结 等也要接(should)+ decide, desire, intend, recommend等也要接(should)+动词原形结 构。 • Mother insists that Tom (should) go to bed at nine o’clock. • We suggested that the meeting (should) be held at once. • It was required that the crops (should) be harvested at once. • The suggestion that he (should) be invited was rejected. • That is their demand that their wages (should) be increased. • [注意1] advice, suggestion, order, demand, proposal, request, 注意1] desire, command, decision, requirement等名词引导的同位语从句 或表语从句，谓语动词用 (should) + 动词原形。 • [注意2] It’s suggested/ advised/ 注意2] demanded/ordered/requested/proposed/required/desired等结构 后的主语从句中，谓语动词用(should) + 动词原形。 • [注意3] 注意3] 3]suggest意思是“表明，暗示；说明”时；insist意思是“坚持观点， 坚持看法”时，句子不能用虚拟语气。