外研版八年級英語上冊《Language in use》Accidents PPT教學(xué)課件，共28頁。
Language practice
While the lights were changing to red, a car suddenly appeared round the corner.
When Henry was trying to find the snake, his hand began to hurt badly.
I was trying to pick it up when it bit me again.
課 堂 學(xué) 習(xí)
過去進(jìn)行時與when和while引導(dǎo)的時間狀語連用
過去進(jìn)行時常和when, while 引導(dǎo)的時間狀語連用，構(gòu)成復(fù)合句。
My mother was cooking when I got home.
我母親正在做飯，這時我到了家。
My father was watching TV while my mother was doing cleaning.
（那時）我父親在看電視，我母親在清掃衛(wèi)生
一、when與while的區(qū)別
在when引導(dǎo)的時間狀語從句中，謂語動詞可以是延續(xù)性動詞，也可以是非延續(xù)性動詞。而在while引導(dǎo)的時間狀語從句中，謂語動詞必須是延續(xù)性動詞。
We were talking when the teacher came in.
我們正在交談，這時老師進(jìn)來了。
They arrived when/while we were having dinner.
當(dāng)我們正在吃晚飯時，他們到了。
二、when引導(dǎo)的時間狀語從句與主句的時態(tài)
I was walking in the street when the accident happened.
我正在街上散步，這時這起交通事故發(fā)生了。
The accident happened when I was walking in the street.
當(dāng)我正在街上散步時，這起事故發(fā)生了。
[總結(jié)]
能夠延續(xù)的動詞用過去進(jìn)行時，不能延續(xù)的動詞用一般過去時。
三、while 引導(dǎo)的時間狀語從句與主句的時態(tài)
I saw the accident while I was walking on the road.
當(dāng)我正在街上散步時，我看見了這起交通事故。
My mother was watching TV while my father was reading newspapers.
我母親在電視，我父親在讀報紙。
[總結(jié)]
當(dāng)強(qiáng)調(diào)兩個動作同時進(jìn)行時，主句和while從句都用過去進(jìn)行時。
Tapescript:
News reader: And finally, a story about a lucky cat. Here’s Alice to tell us what happened.
Alice: Yes, at about four o’clock yesterday afternoon, I was reading a book in the sitting room. I heard a strange sound from the next room. I went in to look and saw my cat, Pete. He was looking into the fish bowl and trying to get a fish from the bowl!
News reader: And then what happened?
Alice: The fish bowl fell on Pete! I went to pick him up because he doesn’t like water. I took him to the bathroom and dried him!
Possible answers:
1 A terrible accident happened at three o’clock this afternoon on the motorway between London and Cambridge.
2 James Brown was driving too fast along the road.
3 He was not watching the traffic in front of him.
4 The accident happened because the car in front of him slowed down to avoid a rabbit that was running across the road.
5 After the accident, Mr. Brown apologised to the other driver.
Homework
1. Go over what you’ve learnt in Unit 3.
2. Preview the new words and expressions in Module 9.
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關(guān)鍵詞：Language in use PPT課件免費(fèi)下載，Accidents PPT下載，.PPTX格式；
