过去进行时之when-和while的区别.pptVIP

when 和 while用法小结 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 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. ① I was walking to school when I saw a cat in a tree. ②When 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） ③ While I was sleeping in the bedroom, my father came in . ④ 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） ⑤ While Andy was waiting for the bus, he was reading a newspaper. ⑥ 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 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