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1、x一一.概念：概念：表示过去表示过去某一时刻某一时刻或或某一段时间某一段时间正正在进行发生的动作，有时间状语、时在进行发生的动作，有时间状语、时间状语从句（间状语从句（when/whilewhen/while）或上下文）或上下文提示。提示。二二.结构：结构：主主+was/were+doing sth+时间时间 主主+wasnt/werent+doing sth+时间时间 Was/were+主主+doing sth+时间时间?三三.标志标志(at)this time yesterday；at that time;at nine oclock yesterday morning;at seven
2、last night;时间点时间点 from six to nine yesterday morning;all night;all the time;时间段时间段 when 和和 while 引导的时间状语从句引导的时间状语从句 I was having an English class this time yesterday morning.否定句：I an English class this time yesterday.一般疑问句：you an English class this time yesterday?答语：Yes,I ./No,I .提问:you this time ye
3、sterday?was not havingWere havingwaswasntWhat weredoing 否定句：Mike a shower at seven oclock yesterday morning.一般疑问句：Mike a shower at seven oclock yesterday morning.答语：Yes,he ./No,he .提问:he at seven oclock yesterday morning?Mike was taking a shower at seven oclock yesterday morning.wasnt takingWas taki
4、ngwaswasntWhat wasdoingThey were sleeping in their room all night.否定句：They in their room all night.一般疑问句：they in their room all night?答语：Yes,./No,提问：they all night?werent sleepingWeresleepingthey werethey werent.Where weresleeping四一般过去时与过去进行时的区别四一般过去时与过去进行时的区别l 一般过去时一般过去时表示在表示在过去某个时过去某个时间间发生的动作或存在的状
5、态。发生的动作或存在的状态。l 过去进行时过去进行时表示在表示在过去某一时过去某一时刻刻或或某段时间某段时间正在进行的动作。正在进行的动作。1.Mary wrote a letter to her friend last night.Mary was writing a letter to her friend at 9:00 last night.2.She ran yesterday morning.She was running from 7:00 to 7:30 yesterday morning.五五When 和和 while 的用法的用法when 当当的时候，句中既可用的时候，句中
6、既可用延续性延续性动作，句中也可用动作，句中也可用短暂性短暂性动作。动作。while 当当的时候，句中动作必须为的时候，句中动作必须为延延续性动作或状态续性动作或状态。While+过去进行时，过去进行时，+一般过去时一般过去时 过去进行时过去进行时+when+一般过去时一般过去时 一般过去时一般过去时+while/when+was/were过去进行时过去进行时+while+过去进行时过去进行时 When I came into the room,I found him lying there.Mary was having dinner I swam.Mary was having dinne
7、r,I swam.I was listening to music Tom was sweeping the floor.Lily looked after my pet bird I wasnt in.whenWhile whilewhileB特殊用法While/when doing sth“当做事的时候”While/when doing homework,we should think it over.I like English while she likes maths.Fill with“While”or“When”1._ May was talking on the phone,h
8、er sister walked in.2._ Rita bought her new dog,it was wearing a little coat.3._ I saw Carlos,he was wearing a green shirt.WhenWhileWhen4._ I was dancing,he was singing loudly.5._ Linda finally saw Davy,he was jumping with a dog.6.I was cleaning my room _ the fire broke out.WhileWhenwhen六练习六练习 Look!
9、The Greens (wait)at the bus station.2.There (be)some birds_ _ (sing)in the tree this time yesterday.3.Tom (sleep)late with his friends at 10 yesterday morning.4.We (watch)an exciting movie last night.are waitingweresingingwas sleepingwatched5.The alien (be)in the museum _ I called the police station
10、._ the alien (be)in the museum,I called the police.6.I (do)my homework _ my parents (watch)TV at 9 oclock last night.waswhenWhilewaswas doing whilewere watching 1.昨天早上昨天早上9点钟你在干什么点钟你在干什么?What were you doing at 9 oclock yesterday morning?2.不明飞行物起飞时不明飞行物起飞时,小明正在骑自行车小明正在骑自行车.Xiao Ming was riding his bike when the UFO took off.3.那时那时,他们正在做家庭作业他们正在做家庭作业.They were doing their homework at that time.4.今早给你打电话的时候你正在干什么今早给你打电话的时候你正在干什么？What were you doing when I called you up this morning?5.当他正睡觉的时候他梦见了当他正睡觉的时候他梦见了UFO.While he was sleeping,he dreamed about UFO.