while时间状语从句PowerPoint 演示文稿

1、1Part 1 Review ：Past Continuous TenseSentence Pattern ： S + was / were doing （+ time expressions）.Time Expressions: at 6:00 yesterday morning ; at that time; from 2:00 to 4:00 yesterday afternoon2What was he doing at 9:00 yesterday morning?34What was the boy doing from 6:00 to 9:00 last night? 5Lazy

2、 Goat was sleeping on the meadow.Big big wolf and his wife came.While Lazy goat was sleeping on the meadow, big big wolf and his wife came.While：during a period of time （conj.） 当当的时候的时候 （连词）（连词）6Part 2 : While-clause in adverbial of timeWhile sth was happening，sth happened. or While sb/sth was prep.

3、 /adv，sth happened.当某事情正在发生的时候，另一件事情发生了。当某人/事处于某种状态下，另一件事情发生了。（while从句为背景动作从句为背景动作,主句发生在从句过程之中）主句发生在从句过程之中）2. While sth be happening, another one be happening. (be should change with the tense)当一件事情发生的时候，另一件事情也同时正在进行。（while从句可以和主句互换位置，两个动作正在同时从句可以和主句互换位置，两个动作正在同时发生）发生）7 While he was doing his homewo

4、rk，the bell rang. 8 While she was away，her friend helped me.Tips: While 引导的句子为从句从句，表示事情发生的背景动作。 While从句从句中，出现实意动词时，表示一段时间，所以只能选择延续性 动词，用过去进行时过去进行时 短暂性动词：瞬间发生就结束短暂性动词：瞬间发生就结束 eg：come，arrive，die etc. 延续性动词：动作发生后可以持续进行延续性动词：动作发生后可以持续进行 eg：eat ，sing，live etc.9Which one is the While-clause? Which one is

5、the principle clause?Eg: He was walking. A man stole his wallet.= While he was walking, a man stole his wallet. She fell down. She was climbing a ladder.= While she was climbing a ladder, she fell down. She was away. Her friend looked after her child.= While she was away, her friend looked after her

6、 child. 10Part 3: Lets learnHe burned himself while he was cooking.A： You look upset.B： I had a bad day.A： Why？ What happened？B: I burned myself while I was cooking.A: Im sorry to hear that. 11A： You look .B： I had a day.A： Why？ What ？B: A dog me while I was .A: Im to hear that. upset badhappenedbit

7、 delivering the mailsorry12A： You look .B： I had a day.A： Why？ What ？B: I myself while I was my fence.A: Im to hear that. upset badhappenedcutfixingsorry13Part 4：Lets say：oral time！Here is a model: I was very upset yesterday. Because I had a very bad day. I lost my purse while I was shopping. I coul

8、dnt buy anything. I was really angry. What a bad day for me!14 While he was reading，she was cooking. While she was cooking，he was reading. Tips: 两个动作同时发生，主从句调换位置，句意不变！主从句均选择进行 时，动词选择延续性动词！15While he was sleeping，she was doing her homework. While we were waiting for the bus，it was raining.While I was walking ，he was running.Part 5：Lets write！16Part 6：Lets compare!When & While(初步了解) 跟动词时，while后面只能跟延续性动词 - 进行时； when既可以跟延续性动词，也可跟短暂性动词- 进行时 、一般过去时都可以！Eg： While/When he was singing，the lights went out. 表示两个动作同时