2021年春人教版英语八年级下册 时间状语从句中when和while的区别课件.pptx

1、课题：时间状语从句中when和while的区别 科目：英 语 年级：八 年 级 八年级-下册-Unit5 What were you doing when the rainstorm came? Lead-in when和while 有什么区别呢？ presentation presentation presentation learn, work, stand, study, know, walk, keep, have, sing, read等 open, die, finish, begin, come, leave, move, go ,buy等 She borrowed this b

2、ook from the library. presentation when和while引导 时间状语从句 presentation It was raining when she arrived at the station. When you worked, I was sleeping. 非延续性动词 延续性动词 时间点 时间段 presentation 从句中动作既可以与主句的动作同时发生， 又可以在主句动作之前或之后发生。 I was doing homework while my father was watching TV. Dont make any noise while

3、others are reading. 当我做作业的时候父亲正在看电视。 不要制造噪音当别人看书时。 presentation practice 用用when或或while填空填空 1. _ we were talking in the classroom, the teacher came in. 2. _ they got to the airport, it was raining. 3. _ she was reading a book, the phone rang. 4. _ I saw the boy, he was wearing a new coat. 5.Were you

4、drawing the teacher was talking? When/While When When/While While When 延续性动词 非延续性动词 延续性动词 非延续性动词 强调两个动作同时发生 when和while引导时间状语从句 相同点 不同点 当从句中的动作为时 间段，且从句动作为 延续性动词时， when和while都可以 使用 When引导的时间状语从句，从句中 的动词可以是延续性动词也可以是 非延续性动词。但是while从句中的 动词必须是延续性动词。且while常 强调两个动作同时发生，用进行时。 When I was taking a walk in the park, I met him. when 和 while 可以 互换 It was raining heavily when we arrived. 只能用when,不能用while 非延续性动词 summary Thanks for listening, see you!