when一词的用法

when一词的用法•先来看一看2010年全国卷的一道试题：•Tomwasabouttoclosethewindow____hisattentionwascaughtbyabird.•A.whenB.ifC.andD.till•解析：此句中文意思：汤姆正要关上窗户，就在这时一只鸟引起了他的注意。在句式“…beabouttodo”当中应用when，表“这时，突然”，作为从属连词，引导状语从句。••when一词的用法相信大家并不陌生。我们看下2道高考题：•1、TodayIwashavingaPElessonwhileIfelldownandhurtmyfoot.（07福建高考题短文改错）••2、IwasabouttoanswerhimwhileInoticedthatthelastplateonmytraybegantofall.（07辽宁高考题短文改错）•分析：•1、TodayIwashavingaPElessonwhenIfelldownandhurtmyfoot.••2、IwasabouttoanswerhimwhenInoticedthatthelastplateonmytraybegantofall.•这2个题都在考察when一词的用法。可能有些同学会产生疑问，为什么非when莫属呢？while怎么不对呢？让我们谈谈它们的区别。1、While可以作为时间状语从句连词，译成在……期间，一般只和延续性动词连用。When作为时间状语从句的连词，没有这个限制，后面可以是延续性动词，也可以是暂短性动词，因此，一定程度上，when是能代替while的。上面的改错题，从从句的动词上就可以看出while不对，因为fell与noticed都是暂短性动词，不与while连用。•2、但在其余从句中，它们是截然不同的。在本题中，when译成这时，等于andthen，是并列连词，而且专门与过去进行时连用，或者与beabouttodo连用。即：•1）……was/weredoing……when……did正在做……这时……•2）……was/wereabouttodo……when……did正要做……这时……这个知识点是高考中常见的考点。大家可以做一下：•1.（2004上海卷）Jasminewasholidayingwithherfamilyinawildlifepark___shewasbittenonthelegbyalion.•AwhenBwhileCsinceDonce•2.（2006辽宁卷）Hewasabouthalfwaythroughhismeal_____afamiliarvoicecametohisears.•AwhyBwhereCwhenDwhile••3.（2004北京春）Wewereswimminginthelake_____suddenlythestormstarted.•AwhenBwhileCuntilDbefore4.（2006湖南卷）Ihadjuststeppedoutofthebathroomandwasbusilydryingmyselfwithatowel____Iheardthesteps.AwhileBwhenCsinceDafter5.（2006安徽卷）I____alongthestreetlookingforaplacetoparkwhentheaccident_____.Awent，wasoccurringBwent，occurredCwasgoing，occurredDwasgoing，hadoccurred•答案：••1.Awasholidaying……when……正在度假这时被咬••2.Cwasabout……when……正吃到一半这时听到熟悉的声音••3.Awereswimming……when……正在游泳这时暴雨••4.Bwasbusilydrying……when……正在擦干身体这时听到脚步声••5.Cwasgoing……when……正在走着这时发生事故•when做连词，表“当……的时候，突然……”(=andthen;atthattime)，此时不用while替代，when的独特用法。其句型有：was/weredoingsth.when…正在做某事，突然;was/wereabouttodosth.when…正将做某事，突然;had(just/hardlyscarcely/)donesthwhen…刚（未）做完某事，突然;was/wereonthepointofdoingsthwhen…正将做某事，突然等。凡是when表此意义时，其后可用上这个suddenly副词，表突然插入的一动作。•eg.①Ihadhardly／scarcelyenteredmyroomwhen(suddenly)thetelephonerang．＝Hardly／ScarcelyhadIenteredmyroomwhen(suddenly)thetelephonerang．我刚一走进房门，电话就响了。•②IwasthinkingofthiswhenIheardmynamecalled.我正想着这件事时，突然听到有人叫我的名字•③Hewasstillsmilingwhen(suddenly)thedooropenedandhiswifecamein.他正笑着的时候，门突然开了，他妻子走了进来。•④Wewereabouttostartwhen(suddenly)itbegantorain.我们刚要出发就开始下雨了。•⑤Hewasonthepointofleavingwhen(suddenly)someoneknockedatthedoor.他刚要走就有人敲门。•⑥Iwasonthewaytoschoolwhen(suddenly)Isawaboyfellintotheriver.在上学路上，我突然看到个男孩掉进河里。高考语法练习-when用法专练•1.—When_____andvisitourexhibitionnextmonth?•—When_____,I’llletyouknow.•A.willhecome;hewillcome•B.willhecome;hecomes•C.doeshecome;hewillcome•D.doeshecome;hecomes•2.ItwasanexcitingmomentfortheseSpanishfootballfansthisyear,_____forthefirsttimeinyearstheirteamwontheWorldCupchampionship.•A.whichB.that•C.whileD.when•3.When_____withdifficulties,sheranaway.•A.facedB.facing•C.faceD.toface•4.—Didyourememberthedays_____weworkedonthefarm?•—Certainly.Especiallythehardtimes_____wespenttogether.•A.which;when•B.when;which•C.when;when•D.which;which••5.WhenIwasatcollege,I_____threeforeignlanguages,butI_____allexceptafewwordsofeach.•A.spoke;hadforgotten•B.spoke;haveforgotten•C.hadspoken;hadforgotten•D.hadspoken;haveforgotten•6.When_____thepricesofthesegoods,wemusttakeeverythingintoconsideration.•A.comparedB.havingcompared•C.comparingD.compare••7.Ishallneverforgetthoseyears_____Ilivedinthecountrysidewithmyfriends,_____hasagreateffectonmylife.•A.where;whichB.when;which•C.which;thatD.when;that•8.Itwasin1993_____hewasatcollege_____hejoinedtheParty.•A.that;thatB.when;when•C.that;whenD.when;that••9._____hadhearrivedhome_____itbegantorain.•A.Hardly;whenB.Not;until•C.Nosooner;whenD.Nosooner;before•10._____thereisnogravity,ourfeetcannolongerstayontheground.•A.SinceB.When•C.WhileD.As•Key：•1-5BDABB•6-10CBDAB