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Unit3LanguageinuseWhatweretheydoingwhenitbegantorain?Theywereplayingcomputergameswhenitbegantorain.Theywereplayingchesswhenitbegantorain.Theywereplayingfootballwhenitbegantorain.WhileJakewassleeping,whatdidhisbrotherdo?Heplayedbasketball.WhileJakewassleeping,hisbrotherwasplayingbasketball.Whiletheyweredancing,thetelephonerang.Whenthetelephonerang,theyweredancing.Whiletheyweredancing,whathappened?Hewassingingwhenthebabystartedtocry.Whilehewassinging,thebabystartedtocry.Whilehewaswalking,ataxicame.Hewaswalkingwhenataxicame.过去进行时（2）when和while的区别(一)when，while都有“当……时候”的意思。when既可表示某一点时间，也可以表示某一段时间。在when引导的时间状语从句中，其谓语动词可以是延续性的，也可以是非延续性的，可与主句中的谓语动词同时发生，也可在其后发生。如：Iwasjustreadingabookwhenshecameintomyroom.她走进我房间时，我正在看书。Wereyouwritingwhentheteachercamein?老师进来的时候，你在写信吗？Whenhewasachild,hewasalwaystryingoutnewideas.他小时候就常常试验一些新的设想。(二)while只能表示某一段时间，不能表示某一点时间。在while引导的时间状语从句中，其谓语动词只能是延续性的，而且也只能与主句中的谓语动词同时发生或存在。如：WhileJimwasmendinghisbike,LinTaocametoseehim.正当吉姆修自行车时，林涛来看他。Youcan’tdoyourhomeworkwhileyou’rewatchingTV.你不能一边看电视一边做家庭作业。(三)when和while的区别还在于:while引导的时间状语从句多用进行时态，而when引导的时间状语从句多用一般时态。如：Whiletheyweretalking,thebellrang.他们谈话的时候，上课铃响了。Iwasdoingmyhomeworkwhenmymothercamebackhomeyesterdayevening.昨天晚上妈妈回家的时候，我正在做家庭作。[链接]as所表示的动作与主句同时发生，具有延续的含义，一般与延续行动词连用。如：Asthedoctorswerecheckinghim,thepaingotworse.医生给他做检查时，疼痛加剧了。Iwascominginashewasgoingout.他进来的时候我正出去。注意(1)如主句谓语动词表示的是短暂动作，从句时间状语指一段时间，when,while,as三者可通用。Petercameinwhile/asIwaswatchingTV.当Peter进来的时候我正在看电视。IwaswatchingTVwhenPetercamein.当Peter进来时我正在看电视。Heenteredtheroomwhen/as/whilethemeetingwasgoingon.正当开会的时候他走进了房间。(2)as和while可用来指一段时间，但as强调主句与从句表示的动作同时发生，while强调主句表示的动作是在while从句的动作延续中发生。Asmymothersangthoseoldsongs,tearsrandownhercheeks.当我妈妈唱起那些老歌时，眼泪顺着她的脸颊流了下来。Icameinwhilehewasreadinganinterestingbookinhisroom.我进来时他正在房间里读一本有趣的书。1.I______________(watch)TVwhenshe_______(call).2.Whenthephone_______(ring),she___________(write)aletter.3.Whilewe____________(have)apicnic,it_________(start)torain.4.WhileJohn____________(sleep)lastnight,someone_______(steal)hiscar.waswatchingcalledrangwaswritingwerehavingstartedwassleepingstole5.Whilewe____________(wait)forthebus,agirl____________(run)uptous.6.I____________(telephone)afriendwhenBob__________(come)in.7.Jim____________(jump)onthebusasit____________(move)away.8.We____________(test)thenewmachinewhentheelectricity________(go)off.werewaitingwasrunningwasphoningcamewasjumpingwasmovingweretestingwent9.Whilemother___________(make)thebed,thedoorbell____________(ring).10.AsI____________(walk)inthepark,it_______(begin)torain.11.Itwasquitelateatnight.George__________(read)andAmy__________(play)herneedlewhenthey__________(hear)aknockatthedoor.wasmakingrangwaswalkingbeganwasreadingwasplayingheard()1.Mary______adresswhenshecutherfinger.A.madeB.ismakingC.wasmakingD.makes解析：割伤手指是已发生的事情，应用过去时。同时，when表时间的同时性，“玛丽在做衣服时”提供事情发生的背景，因此用过去进行时。C()2.Whileshe___thenewspaper,Granny___asleep.A.read;wasfallingB.wasreading;fellC.wasreading;wasfallingD.read;fell解析：句中的while意为“当……之时”。描述一件事发生的背景时，用过去进行；一个长动作发生的时候，另一个短动作发生。句意为“在她看报纸时，奶奶睡着了”。句中的fell(fall的过去时)是系动词，后跟形容词，如fallsick。过去进行时的基本用法:表示过去某个时刻或时间正在进行过持续进行的动作,句中往往需要有时间状语来表示这一特定的时间。Whatweretheydoingjustnow?他们刚才在干什么?B()1.MybrothercamebackhomewhileI______homework.(2010四川省内江市)A.amdoingB.weredoingC.wasdoingC[中考链接]()2.I_______thecharityshowonTVwhenthetelephonerang.(2010江苏省宿迁市)A.watchB.watchedC.amwatchingD.waswatchingD()3.It______heavilywhenIleftthecinema.(2010·北京市)A.rainsB.willrainC.israiningD.wasrainingD()4.WhenIcamebackyesterdayevening,mybrother________hishomework.(2011湖南长沙)AisdoingB.hasdoneC.wasdoingC()5.IwasveryangrywithJohn—hejust_______whenIspoketohim.(2011江苏徐州)A.isn’tlisteningB.hasn’tlistenedC.didn’tlistenD.wasn’tlisteningD()6.ImetagoodfriendofminewhileI_______onthestreet.(2011梧州)A.walksB.walkC.waswalkingD.amwalkingC()7.MrsWhite_____dinnerwhenhersoncamehome.(2011浙江衢州)A.iscookingB.wascookingC.arecookingD.werecookingB()8.I________whentheUFOlanded.(2011四川宜宾)A.amwatchingTVB.waswatchingTVC.havewatchedTVD.watchedTVB()9.Jenny_____inthekitchenwhenyoucalledherat5o'clockthisafternoon.(2012广东)A.iscookingB.wascookingC.cooksD.CookedB()10.—Mr.Li______toMarycarefullywhenIenteredtheclassroomthismorning.—Heisverypatient______heisyoung.(2013广东梅州)A.talking;butB.wastalking;thoughC.talks;thoughD.talked;howeverB()11.Millie________apicturewhenMrGreencamein.(2013江苏徐州)A.drawB.willdrawC.drewD.wasdrawing()12.What____you_____whenthecaptaincamein?(2013黑龙江齐齐哈尔)A.are;doingB.did;doC.were;doingDCListenandcompletetheaccidentreport.AccidentreportTheaccidenthappenedtoa____called“Pete”ataboutfouro’clockyesterdayafternoon.Whentheaccidenthappened,Alicewas_________inthesittingroom.Sheheardastrange_________fromthenextroom.Petewassittingnexttothefishbowl.Hewaslookingintothewaterandtryingtogeta__________fromthebowl.ThebowlfellonPete.Alicepickedhimupandtookhimtothe__________anddriedhim.catreadingsoundfishbathroomReadthepassageandcheckthetruesentences.1.AcaralmosthitJacklastweek.2.Jackwastalkingonhismobilephonewhenthecarhithim.3.Jackfelldownaholeonhiswaytothepa