人教版英语八年级下Unit5语法专项(过去进行时)课件.ppt

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1、Unit5 语法专项课件语法专项课件（过去进行时）（过去进行时）初中英语人教版八年级下册初中英语人教版八年级下册语法透析语法透析考点大观考点大观易错辨析易错辨析通关训练通关训练考点大观考点大观易错辨析易错辨析通关训练通关训练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。考点大观考点大观易错辨析易错辨析通关训练通关训练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?was/were+doingHe was sleeping at that time.He wasnt sleeping at that time

2、.Was he sleeping at that time?肯定形式考点大观考点大观易错辨析易错辨析通关训练通关训练过去进行时标志词then,at that time,this time yesterday,at 5 oclock last night,all night,all the morning,from 7:00 to 9:00 yesterdayThey were having a class this time yesterday.I was drawing a horse when the teacher came in.考点大观考点大观易错辨析易错辨析通关训练通关训练动名词变

3、化规则口诀口诀规则规则例子例子直1.一般情况下，直接在动词后加-ing。play playing去2.动词以不发音的-e结尾，要去-e加-ing。take taking双3.重读闭音节的动词，要双写词尾字母，再加-ing。cut cutting变4.以-ie结尾的动词，把ie变成y再加-ing。lie-lying考点大观考点大观易错辨析易错辨析通关训练通关训练易错点1when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,le

4、ave,arrive,meet,die等。考点大观考点大观易错辨析易错辨析通关训练通关训练易错点1when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.考点大观考点大观易错辨析易错辨析通关训练通关训练易错点1when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

5、 Wilson.考点大观考点大观易错辨析易错辨析通关训练通关训练易错点1while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。考点大观考点大观易错辨析易错辨析通关训练通关训练易错点1while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.考点大观考点大观易错辨析易错辨析通关训练通关训练易错点1while

6、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.考点大观考点大观易错辨析易错辨析通关训练通关训练易错点2用法不同过去进行时和一般过去时的区别过去进行时过去进行时一般过去时一般过去时1.表示动作在持续或未完成。1.表示某一动作已经完成。2.表示动作反复地进行。2.表示只做一次动作。考点大观考点大观易错辨析易错辨析通关训练通关训练易错点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 la

7、st 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）考点大观考点大观易错辨析易错辨析通关训练通关训练易错点2标志词不同过去进行时和一般过去时的区别过去进行时过去进行时一般过去时一般过去时过去时间点：at that time,this time yesterday,at 7 oclock yesterday evening等。过去时间点：just now,yesterday,this morning,three yea

8、rs ago等。过去时间段：from six to nine yesterday,from morning till night,all those days等。过去时间段：in the past,in+过去的年份,last week,once upon a time等。考点大观考点大观易错辨析易错辨析通关训练通关训练易错点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 cook

9、ing breakfast.（过去进行时）考点大观考点大观易错辨析易错辨析通关训练通关训练易错点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）考点大观考点大观易错辨析易错辨析通关训练通关训练解析解析【典例1】Little Tom _ computer games when his mother got home.A.is playing B.pla

10、ys 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。考点大观考点大观易错辨析易错辨析通关训练通关训练解析解析【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。考点大观考点大观易错辨析易错辨析通关训练通关训练解析解析【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。