過去進行時之when-和while的區(qū)別PPT課件

1、2021/7/241李華蓉李華蓉老師老師 過去進行時過去進行時中的中的whenwhen和和whilewhile湖南省石門縣澧斕中學(xué)湖南省石門縣澧斕中學(xué)2021/7/2422021/7/2432021/7/244He was running.2021/7/245from 8 to 9from 8 to 9yesterdayyesterdaymorningmorningShe was having a Chinese class.2021/7/246 When Jim called him upWhen Jim called him up, he was sleeping.2021/7/247Wh

2、ile Tom walked to schoolWhile Tom walked to school, he was eating.2021/7/248? ?2021/7/249 I was walking to school when I saw a cat in a tree.When Sally arrived home, her mother was cleaning the house. 主句的動作是持續(xù)性的，而從句動作主句的動作是持續(xù)性的，而從句動作是短暫性的，此時用是短暫性的，此時用 _ 引導(dǎo)時間狀引導(dǎo)時間狀語從句，主句用語從句，主句用 _ 時態(tài)，從句時態(tài)，從句用一般過去時態(tài)。用

3、一般過去時態(tài)。when過去進行過去進行（一）（一）2021/7/2410 While I was sleeping in the bedroom, my father came in . David fell while he was riding his bike. 主句的動作是短暫性的，從句的動作主句的動作是短暫性的，從句的動作是持續(xù)性的，此時用是持續(xù)性的，此時用 _ 引導(dǎo)從引導(dǎo)從句，主句用句，主句用 _ 時態(tài)，從句時態(tài)，從句用過去進行時態(tài)。用過去進行時態(tài)。while一般過去一般過去（二）（二）2021/7/2411 While Andy was waiting for the bus, he was reading a newspaper. He was cleaning his car while I was cooking. 主句和從句的動作在過去的某時刻或某主句和從句的動作在過去的某時刻或某段時間同時發(fā)生，而且動作都是持續(xù)性段時間同時發(fā)生，而且動作都是持續(xù)性的，此時用的，此時用 _ 引導(dǎo)從句，而且主引導(dǎo)從句，而且主句和從句都用句和從句都用 _ 時態(tài)。時態(tài)。while過去進行過去進行（三）（三）2021/7/2412短暫性短暫性延續(xù)性延續(xù)性同時發(fā)生同時發(fā)生延續(xù)性延續(xù)性短暫性短暫性對照關(guān)系對照關(guān)系2021/7/2413when過去進行時態(tài)過去進行時態(tài)while一般