1、李华蓉李华蓉老师老师 过去进行时过去进行时中的中的whenwhen和和whilewhile湖南省石门县澧斓中学湖南省石门县澧斓中学He was running.from 8 to 9from 8 to 9yesterdayyesterdaymorningmorningShe was having a Chinese class.When Jim called him upWhen Jim called him up,he was sleeping.While Tom walked to schoolWhile Tom walked to school,he was eating.I was w
2、alking 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，而从句动作主句的动作是持续性的，而从句动作是短暂性的，此时用是短暂性的，此时用 _ 引导时间引导时间状语从句，主句用状语从句，主句用 _ 时态，从时态，从句用一般过去时态。句用一般过去时态。when过去进行过去进行（一）（一）While I was sleeping in the bedroom,my father came in.David fell while he
3、was riding his bike.主句的动作是短暂性的，从句的动作主句的动作是短暂性的，从句的动作是持续性的，此时用是持续性的，此时用 _ 引导从引导从句，主句用句，主句用 _ 时态，从句时态，从句用过去进行时态。用过去进行时态。while一般过去一般过去（二）（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段时间同时发生，而且动作都是持续性的，此时用的，此时用 _ 引导从句，而且主引导从句，而且主句和从句都用句和从句都用 _ 时态。时态。while过去进行过去进行（三）（三）短暂性短暂性延续性延续性同时发生同时发生延续性延续性短暂性短暂性对照关系对照关系when过去进行时态过去进行时态while一般过去一般过去while过去进行过去进行
