1、英语语法 过去进行时过去进行时过去进行时常表示过去某一时刻或过去某一阶段内正在进行的动作常用时间状语：then,just then,at that/the/moment,at this/that time yesterday,yesterday morning/afternoon/eveninig,at eight last night,at sevent yesterday morning,from seven to nine last night,when/while 引导的时间状语从句 是否用过去进行时，要根据语意进行判断是否用过去进行时，要根据语意进行判断过去进行时构成be动词的过去式
2、动词的过去式was/were现在分词现在分词 肯定式疑问式否定式I was workingWere you working?I was not workingHe/She/it was working.Was he/she/it working?Yes,he/she/it was.No,he/she/it wasnt.He/she/it was not working.We were working.Were we working?We were not workingYou were workingWere you working?You were not workingThey were
3、workingWere they working?They were not working过去进行时用法表示过去某段时间内持续进行的动作或者事情 表示过去某一时间正在进行的动作 WewerewatchingTVfromseventoninelastnight.WhatwasheresearchingalldaylastSunday?Mybrotherfellwhilehewasridinghisbicycleandhurthimself.Itwasrainingwhentheyleftthestation.WhenIgottothetopofthemountain,thesunwasshin
4、ing.Whatwasshedoingatnineoclockyesterday?WhenIsawhimhewasdecoratinghisroom.be动词的过去进行时也可以表示过去一时的状态或者暂时的状态Hewasfriendly.他很友好。Hewasbeingfriendly.他当时显得很友好。when和while引导的时间状语从句Whiletwodetectiveswerekeepingatthedoor,twoothersopenedtheparcel.WhenIsawhimhewasdecoratinghisroom.WhenIgottothetopofthemountain,th
5、esunwasshining.Whilehewaswaitingforthebus,hewasreadinganewspaper.Itwasrainingwhentheyleftthestation.WhenIwasdoingmyhomework,mymotherwascooking.when or while？一般过去时一般过去时 or 过去进行时？过去进行时？when和while引导的时间状语从句用法while用于持续性动词；when既可用于持续性动词，也可用于瞬间性动词 两个动作都是持续性动作，且两个动作几乎是同时开始，同时结束，那么都用过去进行时动作长短不一样，那么时间长的用过去进行时
6、，时间短的用一般过去时通常，瞬间性动词用一般过去时，持续性动词用过去进行时 一个动作先发生，在此动作结束前，另一个动作发生了，那么先发生的动作用过去进行时，后发生的动作用一般过去式；when和while引导的时间状语从句Whiletwodetectiveswerekeepingatthedoor,twoothersopenedtheparcel.WhenIsawhimhewasdecoratinghisroom.WhenIgottothetopofthemountain,thesunwasshining.Whilehewaswaitingforthebus,hewasreadinganewsp
7、aper.Itwasrainingwhentheyleftthestation.WhenIwasdoingmyhomework,mymotherwascooking.一般过去时和过去进行时比较（一）一般过去式常表示在过去某时发生的动作或存在的状态（包括过去习惯动作），强调事件 过去进行时表示过去某一段时间或某一时刻正在进行的动作，强调过程 I was sixteen years old last year.He worked in a factory in 1986.I met her in the street the day before yesterday.He often swam i
8、n the river when he was young.What were you doing at seven p.m.yesterday?I first met Mary three years ago.She was working at a radio shop at the time.I was cooking when she knocked at the door.一般过去时和过去进行时比较（二）一般过去时表示某一动作已经完成，过去进行时却表示动作在持续或未完成 I saw you while you were speaking to the teacher.She wrote a letter to her friend last night.She was writing a letter to her friend last night.一般过去时和过去进行时比较（三）一般过去式表示只做一次动作过去进行时可表示动作反复进行 She shaved to me.她朝我挥手。She was shaving to me.她朝我不停地挥手。PPT模板下载：
