高中英语before的用法

1、 before的用法，     一、可以用作介词     )指时间上早于，在之前，如：     She has lived here since before the war.     她从战前就一直在这儿住。     )指位置在前面，如：     We knelt down before Grandmas grave.   &

2、#160; 我们在奶奶的墓前跪下。     )指顺序或排列在之前，如：     Your name comes before mine on the list.     名单上你的名字在我之前。     )在某人面前，如：     She said it before the witness.     他是当着证人的面说的。   

3、;  二、作为连词     其基本含义是“在之前”，又可以根据不同语境灵活翻译成“才”、“还没来得及就”、“趁”、“就”等。具体用法如下：     )与情态动词can/could连用     这时候从句虽为肯定形式，根据汉语表达习惯译成“还没来得及就”，如：     Before I could get in a word，he had measured me.     我还没

4、来得及插话他就为我量好了尺寸。     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。     )用于肯定句中强调主句所表达的时间，距离长，或花费的精力大，译成“才”     We had sailed four days and four nights before

5、 we saw lands.     我们航行了四天四夜才看到陆地。     We waited a long time before the train arrived.     我们等了很长时间火车才到。     )用于否定句中，强调主句所表达的时间，距离短，或花费的精力小，译成“不到就”如：     We hadnt run a mile before he felt tired. 

6、0;   我们跑了还不到一英里他就累了。     )主句含有hardly，scarcely等半否定副词时可以译为“刚就”     这时候主句应用过去完成时态，从句用过去时，还可以用when替代before如：     We had scarcely reached the school before/when the bell rang.     我们刚到学校铃声就响了。    

7、; )有时还有“宁愿”的意思 Id shoot myself before I apologized to him.我宁死也不向他道歉。I'd die before I'd tell. 我宁死也决不会说出来。 否则,要不然Get out before I call the police. 滚开,否则我叫警察。  )用于It+be/take+时间段+before句型     在这一句型中又可以根据主从句的时态分成两种情况。     若主句是一般时将来时态，从句是一般现在时.若主句是

8、肯定句意思是“要过多长时间才”；若主句是否定形式翻译成“用不了多久就”。     It will be two weeks before everything returns to normal.     两周之后一切才能恢复正常。     It will be many years before the situation improves.     这种状况或许要过许多年才能得以改善。     

9、;It wont be long before we meet again.用不了多久我们就会再见面的。     这时若主句是一般过去时从句也是一般过去时。若主句是肯定句翻译成“多长时间之后才”，若主句是否定形式翻译成“没过多久就”。如：     It was some time before I realized the truth.     过了很长一段时间我才了解到真相。     It wasnt long before she

10、became a brave solider.     没过多久她就成了一名勇敢的战士。     After that it still took seven years before they got married.     他们又过了七年才结婚。     注意：当主句的谓语动词为延续性动词时，before与until有时可以互换。It was an hour before/until the police arrived.

11、60;   巩固练习     (2004天津)It was evening _ we reached the little town of Winchester.     Athat B.until C.since D.before     2.(2004全国)Several weeks had gone by _we realized the painting was missing.     A.as

12、B.before C.since D.when     3.(2005广东)The America Civil War lasted four years _ the North won in the end.     A.after B.before C.when D.then     4.(2005山东)It was some time _ we realized the truth.     A.when B.until C.since D.before     5.(2006四川)-Why didnt you tell him about the meeting？     -He rushed out of the classroom _ I could say a word.     A.before B.until C.when D.after     6.(2006福建)-How long do you t