过去进行时之when和while的区别.ppt

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1、李华蓉老师 过去进行时中的when和while,湖南省石门县澧斓中学,rammar,What was Jay Chou doing at 8 this morning?He was,He was running.,from 8 to 9yesterdaymorning,She was having a Chinese class.,When Jim called him up,When Jim called him up,he was sleeping.,While Tom walked to school,While Tom walked to school,he was eating.,?

2、,I was walking to school when I saw a cat in a tree.When Sally arrived home,her mother was cleaning the house.主句的动作是持续性的，而从句动作是短暂性的，此时用 _ 引导时间状语从句，主句用 _ 时态，从句用一般过去时态。,when,过去进行,（一）,While I was sleeping in the bedroom,my father came in.David fell while he was riding his bike.主句的动作是短暂性的，从句的动作是持续性的，此时用

3、 _ 引导从句，主句用 _ 时态，从句用过去进行时态。,while,一般过去,（二）,While Andy was waiting for the bus,he was reading a newspaper.He was cleaning his car while I was cooking.主句和从句的动作在过去的某时刻或某段时间同时发生，而且动作都是持续性的，此时用 _ 引导从句，而且主句和从句都用 _ 时态。,while,过去进行,（三）,Exercise,when or while?1._the telephone rang,he was reading._ he was read

4、ing,the telephone rang.2.Bob was sleeping _his mother was cooking.3.I was studying here_the rainstorm came.4.Dont use your phone_ you are driving.,When,短暂性,While,延续性,while,同时发生,when,延续性,while,短暂性,对照关系,when 和 while用法小结,主句的动作是持续性的，而从句动作是短暂性的，此时用 引导时间状语从句，主句用，从句用一般过去时态.,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

5、句用 时态，从句用过去进行时态.,when,过去进行时态,while,一般过去,when 和 while用法小结,主句和从句的动作在过去同时发生，而且动作都是持续性的，此时用 引导从句,而且主句和从句都用 时态。,while,过去进行,Homework,Fill in the blanks.1.What _ you _(do)at 9 yesterday?2.I _(watch)TV when my mother _(come)in.3.He_(do)his homework at 9 this morning.4.The children_(play)soccer at 4 yesterday afternoon.5.The baby_(sleep)when her mother came back.,Thanks!,