Unit 4 When was it invented Section A课件 鲁教版.ppt

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1、Unit 4 When was it invented? Section A,1,2,3,4,5,1b Listen and match the inventions with the dates.,a,b,e,d,c,18761885192719711976,a,b,e,c,d,1c PAIRWORK,A: When was the telephone invented ?B: I think it was invented in 1876.,Julie Thompson,battery-operated slippers,Chelsea Lanmon,heated ice cream sc

2、oop,Jayce Coziar and Jamie Ellsworth,shoes with adjustable heels,2a Listen and number the inventions in the order that you hear.,3,1,2,PAIRWORKWho was it / were they invented by ?It was/ They were invented by Chelsea Lanmon.,3a PAIRWORKMake a list of five helpful inventions and five annoying.,planec

3、omputerbikecartrain,atomic bomb （原子弹）missile（导弹）rifle (步枪)chemical weaponinstant glue(速干胶),3b PAIRWORKA: What do you think is the most helpful invention?B: I think the most helpful invention is the light bulb.A: Why is that?B: Well, it gives people more time to workand play every day.A: What do you

4、think is a helpful invention? B: I think it is the car. A: Why is that? B: Well, it makes it possible for people to move to distant places faster.,4 PAIRWORKImagine you are left alone on a small island in the sea. If you are allowed to take five inventions along with you, what would you take? I woul

5、d like to take the followings with me: a knife, a flashlight, a cell phone, a telescope and a gun. A: Id like to have a radio because I could listen to music all day.B: Yes, but thats not going to help you leave the island. I think it would be better to have .,The passive voice被动语态 英语中动词有主动语态和被动语态两种

6、语态。主动语态表示主语是动作的执行者,被动语态表示主语是动作的承受者, 在被动语态中动作的执行者有时用by短语表示出来。被动语态的构成:助动词be+ (及物动词的) 过去分词 am (is, are) + done was (were) + done,一般现在时,一般过去时,The passive voice被动语态被动语态的用法: 不知动作执行者时,常用被动语态。e.g. My bike was stolen yesterday. This car is made in America.2. 不必要说出动作执行者时,常用被动语态。e.g. Rome was not built in a da

7、y.3. 为了突出强调动作的承受者时,常用被动语态。e.g. Thousands of beaches are polluted (污染).,The passive voice被动语态主动语态变为被动语态的步骤:1.把原主动句中的宾语转换为被动语态的主语。2.把动词改为被动形式,即 “be + 过去分词” 。注意 be动词要按新的主语的人称和数进行变化, 时态要和原来的主动语态的时态保持一致。3. 原来主动语态句中的主语,如果需要,就放在by后面以它的宾格形式出现。如果没有必要就可以省略, 其他的成分 (定语、状语) 不变, 句式也不能变。,Bell invented the telephon

8、e in 1876. The telephone was invented by Bell in 1876.,The passive voice被动语态主动语态变被动语态的结构图:,主语,谓语动词过去式,宾语,时间状语,主语,谓语动词的过去分词,宾语,时间状语,Students book P70, part 4.,Homework,用所给动词的正确形式填空： 1) The bike _(fix) up by Xiao Ming yesterday. 2)Sunglasses _ (use) for protecting peoples eyes. 3) A picture _(put) up on the blackboard. 4) French_ (speak) in France. 5)Teenagers should _(allow) to choose their own clothes.,was fixed,are used,is put,is spoken,be allowed,Good watch prevents misfortune.谨慎消灾。,