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1、过去进行时态详解及练习1.过去进行时用法：①过去某个时间正在发生的动作例：Hewascookingatsixlastnight.昨天晚上六点，他正在做饭。②过去某段时间正在发生的动作例：IwasstayingherefromMarchtoMaylastyear.去年从3月到5月，我一直呆在这里。2.与过去进行时连用的时间状语，常见的有atninelastnight/atthattime=then/atthistimeyesterday/或有whentheteachercamein/whilehewasre
2、ading的提示3.过去进行时的构成：waswere+现在分词4.过去进行时的四个基本句型肯定句Hewascookingatsixlastnight.否定句Hewasnotcookingatsixlastnight.一般疑问句Washecookingatsixlastnight?肯定和否定回答Yes,hewas.No,hewasn’t.特殊疑问句Whatwashedoingatsixlastnight?5.过去进行时的固定句型Jimwasreadingwhentheteachercamein.当老师进来
3、的时候，吉姆正在读书。JimwasreadingwhileKatewaswatchingTV.在凯特正在看电视的同时，吉姆正在读书。JimcameinwhileKatewaswatchingTV.在凯特正在看电视的时候，吉姆进来了。6.与一般过去式的区别:HewatchedTVlastnight.（过去时间lastnight,用一般过去时）HewaswatchingTVatninelastnight.(过去时间lastnight+点时间atnine,用过去进行时)7.when和while的区别①when是
4、atorduringthetimethat,既指时间点，也可指一段时间；while是duringthetimethat，只指一段时间，因此when引导的时间状语从句中的动词可以是瞬间性动词（open, close, finish, begin, come, go, arrive, reach, get to, leave, move, borrow,buy），也可以是延续性动词(learn, work, stand, lie, know, walk, keep, have, wait, watch, si
5、ng, read, sleep, live, stay)，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；Iwassleepingwhenhecalledmeyesterday.Iwillcallyouwhenhecomesback.while则强调主句的动作在从句动作的发生的过程中或主从句两个动作同时发生。LindawastakingashowerwhileMarywaswatchingTV.③由when引导的时间状语从句，主句用过去进行时，从
6、句应用一般过去时；如果从句和主句的动作同时发生，两句都用过去进行时的时候，多用while引导，如：a.Whentheteachercamein,weweretalking.当此句改变主从句的位置时，则为：Whileweweretalking,theteachercamein.b.Theyweresingingwhileweweredancing.④when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.Thechildrenwererunningtomov
7、ethebagofricewhentheyheardthesoundofamotorbike.孩子们正要跑过去搬开那袋米，这时他们听到了摩托车的声音。b.Heisstrongwhilehisbrotherisweak.他长得很结实，而他弟弟却很瘦弱。过去进行时练习一. 用when或while填空 1. _____ the teacher came in, we were talking. _____ we were talking, the teacher came in. 2. He was driv
8、ing along ____ suddenly a woman appeared. 3. ____ Jack was waiting at the door, an old woman called to him. 4. He was reading a book ____ suddenly the telephone rang. 5. ____ it began to rain, they were playing ches
