人教版英语八年级下Unit5语法专项(过去进行时)课件.ppt

Unit5 语法专项课件（过去进行时）,初中英语人教版八年级下册,过去进行时定义,过去进行时表示过去某一时刻或某一段时间内正在进行或发生的动作。,过去进行时的结构,否定形式,问句形式,was/were+not+doing,Was/Were+主语+doing?,He was sleeping at that time.,He wasnt sleeping at that time.,Was he sleeping at that time?,过去进行时标志词,then,at that time,this time yesterday,at 5 oclock last night,all night,all the morning,from 7:00 to 9:00 yesterday,They were having a class this time yesterday.I was drawing a horse when the teacher came in.,动名词变化规则,易错点1,when的用法,when和while引导时间状语从句,1.状语从句表示短时间的动作，主句常用进行时态或完成时态。When I came in,he was reading the newspaper.,非延续性动词：come,go,leave,arrive,meet,die等。,易错点1,when的用法,when和while引导时间状语从句,2.状语从句表示长时间的动作或状态，主句常用进行时态。When she was making a call,I was writing a letter.,易错点1,when的用法,when和while引导时间状语从句,3.表示突然发生某事，意思是“正在时突然”，主句常用过去进行时，when从句常用一般过去时。I was just coming along to see you when I ran into Wilson.,易错点1,while的用法,when和while引导时间状语从句,1.主句和从句都用一般过去时。She listened carefully while he read.,延续性动词：read,study,sleep,write,listen,watch等。,易错点1,while的用法,when和while引导时间状语从句,2.从句用过去进行时，主句用一般过去时。While I was watching TV,Tom came in.,易错点1,while的用法,when和while引导时间状语从句,3.主句和从句都用过去进行时。While I was watching TV,she was doing some cleaning.,易错点2,用法不同,过去进行时和一般过去时的区别,易错点2,用法不同,过去进行时和一般过去时的区别,She was writing a letter to her friend at eight last night.She wrote a letter to her friend last night.,(信不一定写完),(信写完了),She waved to me.She was waving to me.,（挥了挥手）,（反复挥手）,易错点2,标志词不同,过去进行时和一般过去时的区别,易错点2,过去进行时和一般过去时的区别,We were having supper at this time yesterday.It was raining all those days.I was reading English while my mother was cooking breakfast.,（过去进行时）,易错点2,过去进行时和一般过去时的区别,I lived in Beijing three years ago.The first Olympic Games happened in 1896.Anny used to be short,but she becomes taller now.,（一般过去时）,【典例1】Little Tom _ computer games when his mother got home.A.is playing B.plays C.was playing D.playing,考查时态。句意：当妈妈到家的时候，小汤姆正在玩电脑游戏。when引导时间状语从句，主句多用进行时，时间发生在过去，故用过去进行时。,【典例2】Turn off the water while you _ your teeth or washing your hands.A.were brushing B.brush C.are brushing D.brushed,考查时态。句意：当你刷牙或洗手的时候，请关掉水龙头。while引导时间状语从句，时态保持一致，brushing与washing并列；习惯的动作，故选现在进行时。,【典例3】I called you at 8:00 yesterday evening,but no one answered.Sorry,I _ clothes at that time.A.wash B.washed D.am washing D.was washing,考查时态。句意：昨晚八点我打电话给你，但是没有人接。不好意思，那个时候我正在洗衣服。at that time为过去进行时标志词，选用was/were doing。,