高三英语when的用法.ppt

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1、Choose the best answer1 We are living in an age _ many things are done on computer.A.which B.that C.whose D.when2 He transplanted the little tree to the garden _ it was the best time for it.A.where B.when C.that D.until3 Jas was holidaying with her family in a wildlife park _ she was bitten on the l

2、eg by a lion.A.when B.while C.since D.once,D,B,A,4 We were just _ calling you up _ you came in.about;when B.on the point of;while C.on the point of;when D.on the point of;as5 The car helps to keep families together _ it is used for picnics,outings and other shared experiences.A.so that B.even though

3、 C.unless D.when6 His parent has been saving like crazy in the past five years for _ he will go to university.A.if B.when C.where D.why7 I had hardly covered more than 30 miles in the snow _ I found that the fuel was used up.A.while B.since C.until D.when8 It was foolish of you to take a taxi _ you

4、could have easily walked there in five minutes.A.when B.while C.but D.though,A,D,D,C,B,The Usage of When,【知识要点】归纳when的用法,When的用法是近十多年来高考试卷中的一个高频考点，既考查其在特定语境中的常规意义,也考查特殊意义.,1.when作从属连词引出状语从句，“当时”,He transplanted the little tree to the garden when it was the best time for it.,The car helps to keep fam

5、ilies together when it is used for picnics,outings and other shared experiences.,(2009年重庆卷)Peter was so excited _ he received an invitation from his friend to visit Chongqing.A.where B.that C.why D.when(2008年四川卷)There were some chairs left over _ everyone had sat down.A.when B.until C.that D.where,（

6、1）入乡随俗.（2）When（we are）young，we are full of hope.年轻时，我们大家总是充满希望。（3）Dont reach sideways when _(stand)on a ladder.站在梯子上时，不要侧着身子去够东西(4)When _(ask)about the possibility that Justin was taken by aliens.,When in Rome，do as Romans do.,注意：从句有时可简化为“when+现在分词/过去分词/形容词/名词/介词短语”,standing,asked,A.when后面的从句谓语动词常用虚

7、拟语气。,（1）She paid when she could have entered free.本来可以免费入场，而她却付了款。（2）She stopped trying when she _ next time.她本来下次有可能获得成功，但她却不再尝试了。（3）They were gossiping，when they _.他们本该工作，却在那里说别人的闲话。,might have succeeded,should have been working,It was foolish of you to take a taxi when you could have easily walke

8、d there in five minutes.,引导让步状语从句，意为“虽然；然而；可是”，相当于although,2.表示对比，“既然；本（应该、可以）却（而），”,B 可以作“既然，考虑到”解，引导原因状语从句，相当于since,now that,as或considering that,I cant tell you anything when you wont listen.How could you,when you knew that this might damage it?,既然你不想听，我就什么也不告诉你了。,既然你知道这样会损害它，你怎么能这样做呢？,但when作“如果；要

9、是”解通常表示对某事是否会发生有把握,if 则表示对某事是否会发生没有把握,3.表示条件，相当于 if，引导条件状语从句。,How can I get a job when I cant even read or write？,How can you hope for mercy when you show none?,Dont be afraid of asking for help _ it is needed.(NMET2003)A.unless B.since C.although D.when,如果我连读和写都不会，我怎么能找到工作呢？,如果你不宽恕别人，你怎么能希望得到别人的宽恕呢

10、？,Let me know when you need money.Let me know if you need money.,(Im sure youll need money),(perhaps youll need money),比较：,4.when表示“还没就”刚就；一就”,常见下列结构：Hardly/scarcely/barely had 主语 done when 主语 did,（1）我们刚刚入睡，铃声就响了起来 _（2）He had scarcely arrived when he had to leave again._。,I had hardly covered more t

11、han 30 miles in the snow when I found that the fuel was used up.,We had hardly fallen asleep when the bell rang.,他刚刚到达就又要离开了。,使用该句型时要注意：hardly 后的谓语动词用过去完成时,when后谓语动词要用过去时hardly位于句首时,hardly 后的句子要倒装，而when引导的句子不倒装。,Hardly had we fallen asleep when the bell rang.,when引导的特殊疑问句调整成陈述句语序，在主句中不同的位置做不同类别的名词性从

12、句，通常翻译为在何时或在那时,When shell be back depends much on the weather.,他什么时候回来很多取决于天气。,His parent has been saving like crazy in the past five years for when he will go to university.,When did you come here？,I dont know_,你什么时候来这里的？译：,when you came here.,(2009安徽卷)A good friend of mine from _ I was born showed

13、 up at my home right before I left for Beijing.A.how B.whom C.when D.which(2006 全国)Please remind me _ he said he was going,I may be in time to see him off.Awhere B.when C.how D.what,解析：考查when引导的宾语从句。句中“when I was born”作介词from的宾语，修饰限定前面的a good friend of mine。句意为：在我动身去北京之前，儿时的一个好友来到了我家。,解析：考查when引导的宾语

14、从句。When 在从句中作时间状语，句子意思为：“提醒我他什么时候走，我好及时给他送行”。,（2007 陕西卷）-_ when has the country been open to international trade?-1978,I suppose.A.Since B.In C.From D.After,When 引导疑问句有两种构成：（1）介词Since/Till+when+一般疑问句？（注：此时when作疑问代词，作介词的宾语。）；（2）when+一般疑问句？（注：when 作疑问副词，在特殊疑问句中作状语。）。,解析：since 意为“自从”，常与现在完成时连用，表示动作从某个时

15、候开始，一直延续到现在。此题根据特殊疑问句中的时态可判断用since，句意为：这个国家从什么时候起进行国际贸易的？,Have you decided _(何时去观光)？,when 还可以接不定式,when to go sightseeing,When have you been here？How long have you been here？,when问的是具体时间，所以不能和完成时连用。,What time does the train leave?When will you graduate?,what time 指具体的时间的，而when 指 大体的时间,强调具体是几点几分.可以与Wh

16、en混用.,强调大体上的时间,此处不能用What time.,when引导定语从句，翻译为在那时,注意：做这类题关键是将先行词还原看其在从句中所作的成分,1).Do you still remember the days _ we spent in Qingdao?2).Do you still remember the days _ we spent the summer holidays in Qingdao?,that,when,We are living in an age when many things are done on computer.,(2009江苏卷)Because

17、of the financial crisis,days are gone _ local 5-star hotels charged 6,000 yuan for one night.A.if B.when C.which D.since,(2008山东卷)Occasions are quite rare _ I have the time to spend with my kids.A.who B.which C.why D.when（2008 上海卷）We went though a period _ communications were very difficult in the r

18、ural areas.A.which B.whose C.in which D.with which,when引导定语从句代替的先行词在从句中作时间状语，但此时定语从句之前的先行词不是time/day等明显的时间名词，而为隐性的如:occasion,ages,period等。在这时when可以换为“介词+which”结构。,（2008 延考区）Jane is back in May,by_ the new house should be finished.A.which B.that C.whom D.when(2007山东卷)The book was written in 1946,_ th

19、e education system has witnessed great changes.A.when B.during which C.since then D.since when,when可以引导非限定性定语从句。近年来常考：介词（since/from）+关系代词when引导的定语从句，其前常是时间状语。注意：介词的宾语一般都由关系代词来充当，可是在 since,by,from等几个表示时间、或地点的介词后面习惯用when,where或者which+名词作宾语。这种用法常见于非限制性定语从句中,常见下列结构：was/were doing sth when had done sth w

20、hen was/were about to do sth when was/were on the point of doing sth when,when连接并列句，表示“就在那时”，相当于“and just at that time”,Jas was holidaying with her family in a wildlife park when she was bitten on the leg by a lion.,We were just on the point of calling you up when you came in.,Conclusion,The Usage o

21、f When,Introducing an adverbial clause,1.when作从属连词引出状语从句，“当时”,注意：从句有时可简化为“when+现在分词/过去分词/形容词/名词/介词短语”,A.when后面的从句谓语动词常用虚拟语气。,引导让步状语从句，意为“虽然；然而；可是”，相当于although,2.表示对比，“既然；本（应该、可以）却（而），”,B 可以作“既然，考虑到”解，引导原因状语从句，相当于since,now that,as或considering that,4.when表示“还没就”刚就；一就”,常见下列结构：Hardly/scarcely/barely had

22、 主语 done when 主语 did,使用该句型时要注意：hardly 后的谓语动词用过去完成时,when后谓语动词要用过去时hardly位于句首时,hardly 后的句子要倒装，而when引导的句子不倒装。,但when作“如果；要是”解通常表示对某事是否会发生有把握,if 则表示对某事是否会发生没有把握,3.表示条件，相当于 if，引导条件状语从句。,Introducing a noun clause,when引导的特殊疑问句调整成陈述句语序，在主句中不同的位置做不同类别的名词性从句，通常翻译为在何时或在那时,When 引导疑问句有两种构成：（1）介词Since/Till+when+一般

23、疑问句？（注：此时when作疑问代词，作介词的宾语。）；（2）when+一般疑问句？（注：when 作疑问副词，在特殊疑问句中作状语。）。,Introducing an attributive clause,when引导定语从句，翻译为在那时,注意：做这类题关键是将先行词还原看其在从句中所作的成分,when引导定语从句代替的先行词在从句中作时间状语，但此时定语从句之前的先行词不是time/day等明显的时间名词，而为隐性的如:occasion,ages,period等。在这时when可以换为“介词+which”结构。,when可以引导非限定性定语从句。近年来常考：介词（since/from）+

24、关系代词when引导的定语从句，其前常是时间状语。注意：介词的宾语一般都由关系代词来充当，可是在 since,by,from等几个表示时间、或地点的介词后面习惯用when,where或者which+名词作宾语。这种用法常见于非限制性定语从句中,常见下列结构：was/were doing sth when had done sth when was/were about to do sth when was/were on the point of doing sth when,1.when连接并列句，表示“就在那时”，相当于“and just at that time”,Connecting

25、a compound sentence,Practice,真题再现1.Generally speaking,_ according to the directions,the drug has no side effect.(2003上海)A.when taking B.when takenC.when to take D.when to be taken2.When _,the museum will be open to the public next year.(2002上海春季)A.completed B.completingC.being completed D.to be comp

26、leted,【2012安徽】30.When for his views about his teaching job,Philip said he found it very interesting and rewarding.A.asking B.asked C.having asked D.to be asked,4（2011江西卷）29.Please call my secretary to arrange a meeting this afternoon,or _ it is convenient to you.A.whenever B.however C.whichever D.wh

27、erever,5.(2010四川卷20).Because of the heavy traffic，it was already time for lunch break she got to her office.A.since B.that C.when D.until,6 Why do you want a new job _ youve got such a good one already?(NMET1998)A.that B.where C.which D.when,7.(2006山东卷)How can you expect to learn anything _ you neve

28、r listen?A.in case B.even if C.unless D.when,8._ got into the room,_ the telephone rang.(1988)A.He hardly had;then B.Hardly had he;whenC.He had not;than D.Not had he;when,10.I hate _ when people talk with their mouths full.(1998)A.it B.that C.these D.them11.I remember _ this used to be a quiet villa

29、ge.(1993)A.when B.how C.where D.what12.What I asked him is _the story happened.(1990)A.when and what B.which and where C.what and where D.when and where13 As soon as he comes back,Ill tell him when _ and see him.（2005北京卷）A you will come B will you comeC you come D do you come,9【2012全国卷II】I had hardl

30、y got to the office _ my wife phoned me to go back home at once.A.whenB.thanC.untilD.after,14.The film brought hours back to me _I was taken good care of in that faraway village.(NMET2001)A.until B.that C.when D.where15.It was an exciting moment for these football fans this year,_ for the first time

31、 in years their team won the World.(2000北京春招)A.that B.while C.which D.when16.I shall never forget those days _I lived in the countryside with the farmers,_had a great effect on my life.(1994上海)A.that;which B.when;whichC.which;that D.when;who,21【2012浙江】9.We live in an age _ more information is availa

32、ble with greater ease than ever before.A.why B.when C.to whom D.on which,18（2011天津卷）10.The days are gone _ physical strength was all you needed to make a living.A.when B.that C.where D.which,17(2004湖北卷)There was _ time_ I hated to go to school.A.a,that B.a,when C.the,that D.the,when,19（2011江苏卷）24Bet

33、ween the two parts of the concert is an interval,_ the audience can buy ice-cream.AWhen BWhere Cthat Dwhich,20（2011福建卷）33.It was April 29,2011 _ Prince William and Kate Middleton walked into the palace hall of the wedding ceremony.A.that B.when C.since D.before,22.He was about to tell me the secret

34、_ someone patted him on the shoulder.(2002上海)A.as B.until C.while D.when23.The students _ busily when Miss Brown went to get a book she _ in the office.(MET1991)A.had written;left B.were writing;has leftC.had written;had left D.were writing;had left24I was just talking to Margaret when Jackson cut i

35、n（05湖南卷）25 I was on the highway when this car went past followed by a police car.They must have been doing at least 150 kilometers an hour.（2005重庆卷）,26（2006 湖南卷）I had just stepped out of the bathroom and was busily drying myself with a towel_ I heard the steps.A.while B.when C.since D.after27（2006 辽

36、宁卷）He was about halfway through his meal _ a familiar voice came to his ears.A.why B.where C.when D.while,29（2011浙江卷）4.One Friday,we were packing to leave for a weekend away _ my daughter beard cries for help A.after B.while C.since D.when,28(2010全国卷卷II 7).Tom was about to close the windows_ his att

37、ention was caught by a bird.A.when B.if C.and D.till,30 2010湖南高考Parents are busy people.If they are working,they are usually not at home 48 _ their children return from school.,after/when,2013四大名校月考2013雅礼一 28.The visitors had just left the museum _ he heard a bomb explode at the exit.A before B sinc

38、e C as soon as D when54._ you exercise,your body produces something that makes you relaxed.,While/When,2013附中三-Anna Mary Robertson,better known as Grandma Moses,turned to painting 49._ she was too old to work on her farm.2013一中三 Could there be a day_robots have rights and are given the vote?Will sci

39、entific advances mean that they have real feeling and experience emotions?A when B where C then D which,because/when,2013一中三 Like the harnessing(利用)of electricity in our cities or the fall of the Berlin Wall,English represents hope 54_a better future-a future 55_ the world has a common language to solve its common problems2013 附中一 28.-He was nearly killed in the rainstorm in Beijing.-When was _?-_ was on July,21 _ he was driving to his office.A that;It,when B this;This,thatC this;It,when D this;It,that51._ he moved out,a saxophonist moved in.,for,where/when,After/When,