Unit9 When was it invented Section A.ppt

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1、Unit 9When was it invented?Section A发明使人类由黑暗走向光明。inventorEdisoninventionlight bulbMake conversations:A:Ithink the telephone was invented before the car.B:I agree.I think the calculator was inverted after TV1a-number the pictures calculator1bListen and match the inventions Listen and match the invent

2、ions with the dates.with the dates.abedc18761885192719711976dabec A:When was the computer invented B:It was in vented in 1976.n1976Pairwork(1c:P68)Pairwork(1c:P68)1927Pairwork(1c:P68)1876Pairwork(1c:P68)1971The passive voice.被动语态被动语态 英语中动词有主动语态和被动语态两种语态.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

3、用by短语表示出来.被动语态的被动语态的构成构成:助动词be+(及物动词的)过去分词 一般现在时一般现在时一般过去时一般过去时am (is,are)+donewas(were)+doneThe passive voice.被动语态被动语态主动语态变为被动语态的步骤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

4、能变.The passive voice.被动语态被动语态主动语态变被动语态的结构图主动语态变被动语态的结构图:Bell invented the telephone in 1876.The telephone was invented by Bell in 1876.主语谓语动词过去时宾语时间状语主语谓语动词的过去分词宾语时间状语The passive voice.被动语态被动语态主动语态改被动语态主动语态改被动语态:Bellinvented the telephone in 1876.wasbyBell invented the telephone._ was invented by _.

5、The telephoneBellKarl Benz invented the car._ was invented by _ .The carKarl Benz将下列句子由主动句变为被动句或由被动句变为主动句：将下列句子由主动句变为被动句或由被动句变为主动句：1)Zheng Jie invented this special pen.变被动变被动句句2)The bike was fixed up by Jimmy.变主动句变主动句3)People use sunglasses to protect their eyes.4)Teachers allow students to put up hands in class.This special pen was invented Zheng Jie.Jimmy fixed up the bikeSunglasses are used(by people)to protect eyes.Students are allowed(by teachers)to put up hands in class.