unit9课件一.ppt

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1、Unit 9When was it invented?Section A 1a-1c1a-1cJing XiaojuanTalk about the history of inventions.The passive voice.Language Goals:Grammar Focus:1bListen and match the inventions Listen and match the inventions with the dates.with the dates.abedc18761885192719711976dabec1cWhen was the telephone inven

2、ted?I think it was invented in 1876.The 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.被动语态被动语态被动语态的用法被动语态的用法:1.不知动作执行者时,常用被动语态.eg.My bike was stol

3、en yesterday.This car is made in America.2.不必要说出动作执行者时,常用.eg.Rome was not built in a day.3.为了突出强调动作的承受者时,常用被动语态.eg.Thousands of beaches are polluted(污染).The 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

4、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.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Doing is more difficult than saying,finish them please!1 Ms Jing teaches

5、English in our school.2 Farmers grow wheat every year.3 Parents should allow teenagers to choose their own clothes.4 We must keep the classroom clean every day.5 They built the building last year.6 The policemen caught the thief last night.Lets find out whos the cleverest and fastest student in our

6、class!()1 The Peoples Republic of China _ on October 1,1949.A.found B.was founded C.is founded D.was found()2 English _ in Canada.A.speaks B.are spoken C.is speaking D.is spoken()3 This English song_ by the girls after class.A.often sings B.often sang C.is often sang D.is often sung()4 New computers

7、 _ all over the world.A.is used B.are using C.are used D.have used()5 Our room must _ clean.A.keep B.be kept C.to be kept D.to keep()6-Id like to buy that coat.-Im sorry._.A.it sold B.its selling C.Its been sold D.it had been sold ()7 The key _ on the table when I left.A.was left B.will be left C.is left D.has been left