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过去进行时一．概念：过去进行时主要表示过去某个时刻或某一阶段正在进行的动作，常和表示过去的时间状语then，atthattime/moment，yesterday，atnine，lastnight等连用或者与when,while,as引导的过去时间状语连用。但在不少情况下，没有表示时间的状语，这时需要通过上下文来表示。WewerewatchingTVfromseventoninelastnight.WhatwasheresearchingalldaylastSunday?二．过去进行时的主要用法是描述一件事发生的背景；一个长动作发生的时候，另一个短动作发生（长动作用过去进行时，短动作用一般过去时）。也可以表示两个动作同时发生，此时均用过去进行时WhenIsawhimhewascleaninghisroom.Whilehewaswaitingforthebus,hewasreadinganewspaper.HewascleaninghiscarwhileIwascooking.三．When/While“当……的时候”的区别①when既指时间点，也可指段时间，while只指段时间，因此when引导的时间状语从句中的动词可以是短暂性动词，也可以是延续性动词，而while从句中的动词必须是延续性动词。②when说明从句的动作和主句的动作可以是同时，也可以是先后发生；while则强调主从句动作同时发生。Theyweresingingwhileweweredancing.③when和while还可作并列连词。when表示“在那时”；while表示“而，却”，表对照关系。如：a.Thechildrenwereplayingwhentheyheardthesoundofamotorbike.b.Heisstrongwhilehisbrotherisweak.典型例题1)Mary___adresswhenshecutherfinger.A.madeB.ismakingC.wasmakingD.makes2)Asshe___thenewspaper,Granny___asleep.A.read；wasfallingB.wasreading；fellC.wasreading；wasfallingD.read；fell四、通常不能用于过去进行时的动词主要有：agree,be,believe,belong,care,forget,hate,have(拥有),hear,know,like,love,mean,mind,notice,own,remember,seem,suppose,understand,want,wish等。例如：误：Iwasknowingtheanswer.正：Iknewtheanswer.误：Iwasn‘tunderstandinghim.正：Ididn‘tunderstandhim.相关习题I.用所给词的适当形式填空：1.Whilewe__________(wait)forthebus,agirl__________(run)uptous.2.I__________(telephone)afriendwhenBob__________(come)in.3.Jim__________(jump)onthebusasit__________(move)away.4.We__________(test)thenewmachinewhentheelectricity__________(go)off.5.She__________(notwant)tostayinbedwhiletheothers________________(all,work)inthefields.II.单项选择.1.I______amealwhenyou_____me.A.cooked,wereringingB.wascooking,rangC.wascooking,wereringingD.cooked,rang2.Hesaidhe_____todrawaplaneontheblackboardatthattime.A.triesB.triedC.wastryingD.willtry3.Whileshe______TV,she______asoundoutsidetheroom.A.waswatching,washearingB.watched,washearingC.watched,heardD.waswatching,heard4.They_____afootballgamefrom7to9lastnight.A.werewatchingB.watchC.watchedD.arewatching5.Whatbook____you______whenI____youatfouryesterdayafternoon?A.did,read,wasseeingB.did,read,sawC.were,reading,sawD.were,reading,wasseeing