人教PEP八年级英语下册第五单元-过去进行时课件(19页PPT)

1、Unit5 What were you doing when the rainstorm came? 难点名称：过去进行时 八年级下册第五单元第1页，共19页。导入01知识讲解02课堂练习03小结04目 录/contents第2页，共19页。010203学习目标掌握过去进行时的概念及结构掌握过去进行时的用法正确使用连词when和while第3页，共19页。IpostedanoticeontheWeChatgroupat9:00pmlastnight,but3 studentsdidnt reply. What were they doing then? 第4页，共19页。Tom: I was

2、watching TV at 9:00 pm last night.Jerry: I was playing computer at that time.Lily: I was taking a bath when you postedanotice.第5页，共19页。过去进行时（Past continuous tense）表示过去在某一时刻或某一段时间内正在进行的动作或存在的状态。定义结构主语+be(was/were)+动词的现在分词I was cooking at 8:00 pm yesterday.第6页，共19页。过去进行时的用法表示过去某一时刻正在进行的动作：eg. I was dr

3、awing at that time yesterday.表示过去某一时间段内正在进行的动作:eg. I was reading last night.表示一个动作发生时，另一个动作正在进行:eg. When my mum came home, I was sleeping.表示一个动作正在进行,另一个动作突然发生:eg. When I was walking, it rained.表示两个动作同时进行.eg.While I was sweeping the floor , she was cooking,第7页，共19页。时间状语标志： at this （that）time +过去时间 at

4、 +过去时间点 those days from .to .+过去时间when/while 引导的时间状语从句第8页，共19页。when和while使用时到底有什么区别呢？第9页，共19页。When和while的区别When I arrived at home, my mum was cooking.主句的动作时持续的，而从句的动作是短暂的，此时用_引导时间状语从句，主句用_时态，从句用_时态。when过去进行一般过去主句从句短暂性动词（短动作）延续性动词（长动作）第10页，共19页。When和while的区别2. I arrived at home while my mum was cooki

5、ng.主句的动作是短暂性的，从句的动作是持续性的，此时用_引导从句，主句用_时态，从句用_时态。while一般过去过去进行从句主句第11页，共19页。When和while的区别3.I was watching TV while my mother was cooking.主句和从句的动作在过去的某时刻或某时段同时发生，而且动作都是持续性的，此时用_引导从句，并且主句和从句都用_时态。while过去进行主句从句长动作长动作第12页，共19页。当过去的两个动作同时发生，有长有短长动作（延续性动词）-过去进行时短动作（非延续性动词）-一般过去时when 长和短 while 长When和while的区

6、别例外：两个长动作用while口诀：长过进 短一过When I arrived at home, my mum was cooking.2. I arrived at home while my mum was cooking. I arrived at home when my mum was cooking.3.I was watching TV while my mother was cooking.第13页，共19页。巩固练习2.Sally took a photo of her friends while they _ computer games.A.play B. are pla

7、ying Chave played D. were playing 1. I saw the light of your room was still on at two oclock last night. Oh, I _ a football match of the Russia World Cup. A. watched B. was watched C.am watching D. was watching 时态题做题方法： 1. 找时间标志词 2. 确定所用时态 3. 若没有时间标志词，根据语境判断 第14页，共19页。3. _ I arrived at the airport ,

8、 the plane was taking off. （when/while）When巩固练习4.He fell asleep _ he was reading. （when/while）while第15页，共19页。Summary 小结过去进行时（Past continuous tense）表示在过去某一时刻或某一段时间内正在进行的动作或存在的状态。定义：结构：_ (was用于_, were用于_和_)时间状语：_ _ _ _主语+be(was/were)+动词的现在分词单数主语复数主语 youat+具体时间点+一般过去时时间状语at that time/at this time when/while引导的时间状语从句then第16页，共19页。Summary 小结过去进行时的用法：（1）表示过去某一时刻正在进行的动作。（2）表示一个过去的动作发生时，另一个过去的动作正在进行。(也表示一个动作正在进行,另一个动作突然发生)（3）表示两个过去的动作同时进行，这时可用while连接。第17页，共19页。Summa