八年级英语下册Unit3when和while课件人教新目标版.ppt

1、What are you doing now?what is he/she doing now?,What were you doing when I came in?,when表示“当的时候”。引导的时间状语从句常用一般过去时态，主句用过去进行时态。,I was reading/playing,Groupwork: What were you doing when you heard the news?,Liu Xiang won the gold medal at the 2004 Olympics I was ,Groupwork: What were you doing when yo

2、u heard the news?Yang Liwei flew around the earth on October 15, 2003.,Unit 3 Grade 8 What were you doing when the UFO arrived?,UFO: Undentified Flying Object,UFO：Unidentified Flying Object 不明飞行物,1947年6月24日，一名叫做阿诺德的美国商人，架着一架小型飞机在华盛顿州上空，发现一组巨型不明飞行物以1000公里左右的速度，同他一起在空中翱翔。阿诺德的有关目击报告第一次引起公众的兴趣，从此“飞碟”或UF

3、O便迅速流传开来。,my home,bedroom,bathroom,living room,kitchen,Writing,Where were the people when the UFO arrived?,I was in the bathroom.,I was in my bedroom.,I was in the kitchen.,I was in my barber shop.,I was in the barbers chair.,b c f d e,What were they doing when he was playing baseball ?,They were ha

4、ving a haircut.,in the barber shop,a barber,(do my homework),What were you doing when the UFO arrived?,I was doing my homework when it arrived.,(visit my aunt),What were you doing when the UFO arrived?,I was visiting my aunt when it arrived.,(play soccer),What were you doing when the UFO arrived?,I

5、was playing soccer when it arrived.,.,He was swimming.,What was he doing at 8 oclock?,What were they doing at 10:30?,They were running.,What was she doing when the UFO arrived ?,(Play the guitar),She was playing the guitar when it arrived.,What were they doing when the UFO arrived?,(sing),They were

6、singing when it arrived.,Ask and answer in pairs Where were you at 6:00 yesterday evening? What were you doing ?,1 in a river swimming 2 in a park playing basketball 3 in a shop doing some shopping 4 at home cooking 5 at home watching TV 6 at home doing my homework,What were you doing at these times

7、 last Sunday?,A: What were you doing at nine oclock last Sunday? B: I was running. How about you? A: I was reading. B: Youre kidding!,run,read,pairwork,What was he/she doing at ten oclock yesterday morning?,What were they doing at ten oclock yesterday morning?,He was playing soccer at ten oclock yes

8、terday morning.,She was cleaning her room at ten oclock yesterday morning.,They were swimming at ten oclock yesterday morning.,shopping,get out,took off,landed,shout,How many people were talking in the conversation?,There were four people.(policeman,Mr Green,Mrs Black,Mr Brown) What was Mr Green doi

9、ng at 8:00 yesterday morning? He was going home from a meeting. What was Mrs Black doing at 8:00 yesterday morning? She was still working in her company. What was Mr Brown doing at 8:00 yesterday morning? He was watching TV with his wife.,5. 以when和while引导的时间状语从句,1）延续性动词和非延续性动词 延续性动词指动作可以延续一段时间，而不是瞬间

10、结束。 如：work、study、drink、eat等。 非延续性动词指动作极为短暂，瞬间结束。 如：start、begin、hit、jump、knock等。,5. 以when和while引导的时间状语从句,2）在本单元中，出现了以when和while引导的时间状语从句。 when表示“当的时候”。从句中既可用延续性动词，又可用非延续性动词，这些动词既可以表示动作，又可表示状态。从句中的动作既可和主句的动作同时发生，又可在主句的动作之前或之后发生。如： Mary was having dinner when I saw her . The boy was still sleeping when

11、 his mother got home yesterday morning .,5. 以when和while引导的时间状语从句, while表示“在的时候”、“在期间”。它强调主句的动作与从句的动作同时发生或主句的动作发生在从句的动作过程中。while从句中必须是表示动作或状态的延续性动词。如： The weather was fine while we were in Beijing . She called while I was out . 如果主句的动作在从句的动作过程中发生，从句常用进行时。如。 While we were swimming someone stole our cl

12、othes . Dont talk so loud while others are working .,总结,1. when可指时间点，又可指时间段，从句中可用延续性动词，也可用非延续性动词。 2. while总是指一个时间段，从句中必须用延续性动词。,课堂练习,二. 用when，while填空 1. _ the alien was in the museum , I called the police . 2. The boy was walking down the street _ a UFO landed . 3. _ the alien was visiting the museu

13、m , the boy called the TV station . 4. I was cleaning my room _ the fire broke out . 5. _ Linda was shouting his name , some people looked at her . 6. _ Linda finally saw Davy , he was jumping with a dog .,While,when,While,when,While,When,Reading,Writing,Use these pictures to write a story.,1,2,3,4,Look,What can you see in the picture?,At 11:00 am, Linda got to the park on her bike.,What can you see in the picture?,At 11:10 am, Linda was watching some people swimming in the lake.,Her bike was