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1、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
2、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
3、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while4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)A
4、sshe___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:
5、Iknewtheanswer.误:Iwasn‘tunderstandinghim.正:Ididn‘tunderstandhim.相关习题1.Whilewe__________(wait)forthebus,agirl__________(run)uptous.2.I__________(telephone)afriendwhenBob__________(come)in.3.Jim__________(jump)onthebusasit__________(move)away.4.We__________(test)thenewmachinewhentheelectr
6、icity__________(go)off.5.She__________(notwant)tostayinbedwhiletheothers________________(all,work)inthefields.4选择题。1. I______amealwhenyou_____me.a.cooked,wereringing b.wascooking,rang c.wascooking,wereringing d.cooked,rang2. Hesaidhe_____todrawaplaneontheblackboardat
7、thattime.a.tries b.tried c.wastrying d.willtry3. Whileshe______TV,she______asoundoutsidetheroom.a.waswatching,washearing b.watched,washearingc.watched,heard d.waswatching,heard4. They_____afootballgamefrom7to9lastnight.