过去进行时之when和while的区别.ppt

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 9 yesterday morning,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.,?, 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 _ 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 reading , 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 a