Unit 5 Grammar foucus 课件 2022-2023学年人教版八年级英语下册

Section A Grammar Focus-4c Unit 5 What were you doing when the rainstorm came? 现在进行时 （Past Progressive Tense） 过去进行时 (Past Progressive Tense) I am talking to you now. I was taking a shower at eight last night. She is listening to the teacher now. She was doing her homework at the time of the rainstorm. They are taking photos now. They were taking photos when the rainstorm came. We are having English class now. We were reading in the library while Linda was sleeping. 1. 两栏例句中的谓语部分的结构有什么相同和不同之处？ 2. 两栏例句中的时间状语有什么不同？ 3. 现在进行时和过去进行时分别表达什么概念？ 现在进行时 过去进行时 用法 表示在或最近正在进行和发生的动作 表示在过去的某个时间正在进行或发生的动作 构成 be (am/is/are) + doing be (was/were) + doing 时间 Now (或引起注意的look,listen等动词) at eight last night, at the time of the rainstorm, when the rainstorm came, while he was sleeping V-ing 1. 一般动词在原形后面直接加 -ing. 2. 动词词尾有不发音的e字母时，去掉e加-ing. 3. 重读闭音节结尾的动词要双写末尾的辅音字母再加 -ing. take play clean shop sleep buy leave turn kid hit Talk about past events: was/were doing... When to use? 过去进行时 构成： was/were + doing 时间词： 1. 常与表示过去某一时刻的时间状语连用，如： at eight last night, at the time of 2. 常与when 和while 引导的时间状语从句连用，表示当一个动作发生时，另外一个动作正在进行。 3. 过去进行时还可以表示两个过去的动作同时进行，这时可用while来连接两个分句。 1. when: 既指时间点，也可指一段时间 ; while: 只表示一段时间 when引导的时间状语从句中的动词可以是瞬间性动词，也可是延续性动词 while从句中的动词必须是延续性动词 2. 从句谓语动词是过去式时，用when引导； 从句谓语动词是was / were doing，主句谓语动词是过去式时，when 和while都可以引导 3. 主句和从句动作同时发生，两句都用was / were doing, 用while引导从句 4. 主句主语+ was / were doing+ when引导的从句(从句主语+did） 主句主语+ did）+ when / while 引导的从句(从句主语+ was / were doing) 主句主语+ was / were doing + while 引导的从句(从句主语+ was / were doing) While John was playing the piano, Mary left the house. =John was playing the piano when Mary left the house. While John was cleaning his room, Mary turned on the radio. =John was cleaning his room when Mary turned on the radio. While John was shopping, Mary took the car to the car wash. =John was shopping when Mary took the