1、Before 用法小結與考點解讀Before用作連詞時，意思是“在之前。其實，它引導狀語從句時，在 不同的句式中以及漢英表達習慣的不同，before含有不同的含義和用法。從歷年的高考試題可以看出，before是高考考查的熱點詞匯之一。為了幫助 大家掌握，現就對它的用法歸納如下：一、表示“在之后才。副詞 才在漢語中強調某事發生得晚或慢。如果在含有before從句的復合句中，強調從句動作發生得晚或慢時，就可以應用 這種譯法。The American Civil War lasted four years the North won in theen d.2005廣東A. afterB. befor

2、eC. whenD. then解析：答案為B。此題考查連詞before表示“在之后才之的用法，根據本句含義“美國南北戰爭持續了四年，北方才最終取得勝利，可知 此題應選 B。二、表示“還沒來得及就。目的在于強調從句動作發生之前，主句動作已發生。Why didn't you tell him about the meeting? 2006四川卷 He rushed out of the room I could say a word.A. beforeB. untilC. whenD. after解析：答案為A。此題考查連詞before表示“還沒來得及就的用法。句意是“我還沒來得及說一句話

3、，他就沖出了房間。三、 表示“在之前就。這時主句與 before從句中的兩個動作按時間先后依次發生。It was evening we reached the little town of Winchester. 2004 天津A. thatB. untilC. sinceD. before解析：答案為D。此題考查連詞before表示“在之前就的用法。句意是“我們到達小鎮Win Chester之前就已經是黃昏時分了。四、 表示“趁，“等到，或“沒等就等。He made a mistake, but then he corrected the situation it got worse.200

4、3北京A. untilB. when C. beforeD. as解析：答案為C。由made a mistake和轉折詞but可知此題句意是“他出了 過失, 但沒等其進一步惡化，他就調整了局勢。故正確答案為 C 項。五、用于句型“ It + will/would be + 時間段 + before. 句型中，表示 “要過多久才,也可用于“It + may be +時間段+ before.,表示“也 許要過多久才。其否認形式“ It will/would not be +時間段+ before表示“不久就，過不了多久就。1The field research will take John and

5、 Paul about five months; it will bea long timewe meet them again.2007 安徽卷D. whenA. afterB. beforeC. since2How long do you think it will be China sends a manned spacesship to the moon? 2006福建卷Perhaps two or three years.A. whenB. untilC. thatD. before3It long before we the result of the experiment.( 上

6、海春招 2002)A. will not be.will knowB. is.will knowC. will not be.knowD. is.know(4) Scientists say it may be fiveor six yearsit is possible to testthis medicine on human patients. 2004福建A. sinceB. afterC. beforeD. when解析：答案為BDCC。考題1(2)before用于肯定的“ It + will be +時間段+ before.句型中，表示“要過多久才。考題3before在此題 中用于

7、否認句，意為“過不了多久就會再由狀語從句要用一般現在時態替 般將來時的用法可知C項為正確答案，句意是:要不了多久我們就會知道試驗的結 果了。考題 4賓語從句中含有句型“ It + may be + 時間段 + before.表示“也許要過多久才，應選擇答案 Co六、用于句型 “itwas +時間段+ before表示 過了多長時間才。其否認形式“it was n ot +時間段+ before意為“不久就“沒過多長時間就。It was some time we realized the truth. 2005山東A. whenB. untilC. sinceD. before解析：答案為D。b

8、efore用于句型“ itwas +時間段+ before表示 過了多長時間才。該題題意是“過了一段時間我們才意識到事情的真相。 故正確答案為C項。七、和hardly連用，表示“剛一就。該結構主句常用過去完成時，當hardly位于句首時，要用倒裝語序，例如：I had hardly sat dow n before the teleph one rang.Hardly had I sat dow n before the teleph one rang.我剛一坐下就響了。八、和其它相似句型的區別有時候before引導的時間狀語從句與since, when引導的時間狀語從句在以 下結構中較相似，

9、容易混淆。“ It be +時間段+ si nee引導的時間狀語從句表示“自從已經有多長時間了。主句用一般現在時或現在完成時。“It be +時間點+when引導的時間狀語從句表示“某個動作發生時，是 某個時間。主句謂語動詞可以是一般過去時，也可以是一般將來時。1It is almost five years we saw each other last time. 2005 北京春A. beforeB. sinceC. afterD. when2一 Did Jack come back early last night? 2005福建 Yes. It was not yet eight o&

10、#39; clockhe arrived home.A. beforeB. whenC. thatD. until解析：答案為BB。考題1考查的是“ It be +時間段+ si nee引導的時間 狀語從句結構，句意是“自從上次我們見面以來已經近五年沒有見了，應選 擇答案B。考題2考查的是句型“It be +時間點+when引導的時間狀語從句， 句意是“他昨晚回家時還不到8點，應選擇答案B。九、before long 和 long before 的區另廿before long意為不久，很快其中before是介詞，long是名詞，常在句 中作狀語，多與動詞的過去時或將來時連用。例如：The wo

11、rk will be finished before long.工作不久就會完成。Before long he had to move on again.不久，他被迫再次遷移。 long before意為 很久以前其中long是副詞。long before單獨使用時， before是介詞；Io ng before后接從句時，before是連詞。這個詞組常與過去時 或過去完成時連用，跟從句時也可用在一般現在時的句子中。例如：She said that she had heard of it long before. 她說她早就聽說過此事。It will be long before he arr

12、ives. 還要等很久他才能到達。 穩固練習一、選詞填空1. before long/long before(1) he went to America.(2) I hope to see you .(3) She said she had read the novel .(4) I had not waited she came.5It was not he got to know it.2. before/since/when(1) It was four 0' clock they arrived at the town.(2) It has been 3 years his b

13、rother went abroad for further study.(3) It will be more than a week his mother recovers from the disease.二、翻譯以下句子1. 不等我說一句話，她就沖出了房間。2. 他叔叔五年后才能回來。3. 不久之后，敵人就被趕走了。4. 他們不久就會互相了解的。5. 他們正在考慮趁房價未漲時把房子買下來。6. 我沒等多久她就來了。7. 我們還需要很長時間才能完成這項任務。8. 不久他就學會使用電腦了。9. 過了一段時間之后他告訴了我這件事。10. 不久之后我們還會再見面的。11. 大火燒了近四個小時，

14、消防戰士才把它控制住。12. 不久你就會對你的所作所為感到懊悔的。13. 他剛一開口發言，就被其他人打斷了。14. 不久他就知道了三、單句改錯1. It was some time since they realized the importanee os studies.2. It was at midnight when her husband came back home last night.3. It was about five hours when the workers shipped all the goods.4. We will finish the work long

15、before.5. It will be half a year before his brother will graduate from that college.6. I had known her before long.四、單項選擇1. Why did n't you tell him about the meeti ng ?He rushed out of the room I could say a word.A. beforeB. untilC. whenD. after2. How long do you think it will beChina sends a m

16、anned spaceship to the moon?Perhaps two or three years.A. whe nB. un tilC. thatD. before3 .He was told that it would be at least three more month he could recover and return to work.A. whe nB. beforeC. since D. that4. Several weeks had gone byI realized the painting was missing.A. asB. beforeC. sinc

17、eD. whe n5. Scientists say it may be five or six yearsit is possible to test this medic ine on huma n patie nts.A. sinceB. afterC. beforeD. whe n6. The American Civil War lasted four yearsthe North won in theend.A. afterB.beforeC. whe nD. then7.That was really asplendid evening. It 'yearsIenjoye

18、d myself somuch.A. whe nB. thatC. beforeD. since8.It was some timewe realized the truth.A. whe nB. un tilC.sinceD.before9 .He was told that it would be at least three more mon thshe could recove r and return to work.A. whe nB. beforeC. since D. that10. Where' sthat report?I brought it to you you

19、 were in Mr. Black ' office yesterday.A. ifB. whe nC. becauseD. beforeKeys:一、選詞填空1. Before long (2) before long (3) long before (4) long before (5) long be fore2. (1) when (2) since (3) before二、翻譯以下句子1. She had stormed out of the room before I could say a word2. It will be five years before his

20、uncle comes back.3. It was not long before the enemy was driven out of their country.4. It won' tbe long before they understand each other.5. They are thinking of buying the house before the prices go up.6. I had not waited long before she came.7. It will be a long time before we finish the task

21、.8. It wasn' tong before he learned to use the computer.9. It was some time before he told me about this affair.10. It won' tbe long before we meet again.11. The fire lasted about four hours before the firefighters could control it12. It won' tbe long before you feel sorry for what you h

22、ave done.13. He had hardly begun to speak before the others interrupted him.或 Had he begun to speak before the others interrupted him.14. It was not long before he got to know it.三、單句改錯1. since 改為 before 或 was 改為 is2. when改為that或去掉at3. when 改為 before4. long before 改為 before long5. will graduate改為 gr

23、aduates.6. before long 改為 long before四、單項選擇1 5 ABBBC 6- 10 BDDBBbefore的用法27 The most destructive natural disaster, tsunami, came unexpectedly they will always live in peace andcomfort.A after B while C where D whe nbefore的用法:1時間在之前，位置在的前面才,強調before引導的從句動作發生的很晚很遲,例如:He n early kno cked me dow n befor

24、e he saw me.還未來得及/不等就強調主句動作發生在before引導的從句動作之前,例如:He went out before I had a cha nee to tell him the good n ews.不久就，例如:It won 'be long before you get well again.5寧愿也不,例如:He will die of hun ger before he will steal.考例:NMET 2000 Some one 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 before03 北 京 He made a mistake, but then he corrected the situation it got worse.A until B when C before D as04 天津 It was evening we reached the