when_was_it_invented_sectiona

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1、Unit9Period1Whenwasitinvented?No.2MiddleSchoolYuQianfourgreatinventionscompassgunpowderprintingPapermakingA:Whenwasthe…invented?B:Itwasinventedin_____.19761927187618851971lightbulb1879Edison.Whenwasitinvented?Itwasinventedin1879.Whowasitinventedby?Itwasinve

2、ntedbyEdison.What’situsedfor?It’susedforhelpingpeopleseeinthedark.Car1885Whenwasitinvented?Whowasitinventedby?Whatisitusedfor?Benz.Itwasinventedin1885.Itisusedfortraveling.ItwasinventedbyBenz.1876Bell1927BeldKelif19711976Fen.NoymaWhenwasitinvented?Whowasiti

3、nventedby?Whatisitusedfor?A:Look!Thislookssointeresting!B:Ah,it’sagreatinventionofChina.A:Really?When______it_________?B:Ithinkit_______________inHanDynasty.(汉朝)A:What______it______for?B:Guess!A:______it______forholdingwater?B:No.It___________fortestingeart

4、hquakes.A:Wow,it’sreallyamazing!wasinventedwasinventedisusedIsusedisusedThepassivevoice.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.eg.Mybikewasstolenyesterday.ThiscarismadeinAmerican.2.不必要说出动作执行者时,常用.eg.Romewasnotbuiltinaday.3.为了突出强调动作的承受者时,常用被动语态.eg.Thousandsofbeachesare

5、polluted(污染).Thepassivevoice.被动语态主动语态变被动语态的结构图:Bellinventedthetelephonein1876.ThetelephonewasinventedbyBellin1876.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Thepassivevoice.被动语态主动语态变为被动语态的步骤:把原主动句中的动作的承受着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

6、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.Thepassivevoice.被动语态主动语态改被动语态:Bellinventedthetelephonein1876.wasby把下列的句子变为被动语态的句子：1、TheyspeakEnglishinCanada.2、Peopleusedwoodformakingtables.3、TheymakecomputersintheUSA.English

7、isspokeninCanada(bythem).Woodwasusedformakingtables.ComputersaremadeintheUSA.4、TheygrowriceinSouthChina.5.Weplantedmoretreesthisyear.6.Icleanedourclassroomthismorning.Moretreeswereplantedthisyear.Ourclassroomiscleanedthismorning.RiceisgrowninSouthChina.各种时态

8、的被动语态的构成：1.一般现在时态am,is,are+过去分词2.一般过去时态was,were+过去分词1.电话是什么时候发明的？Whenthetelephone?我认为它是1876年发明的。Ithinkin1876.2.他们是用来做什么的？Whatthey?他们是用来在黑暗中看东西的。They’reinthedark.3.他们是被谁发明的？Whowerethey?1.Who’sthelittleb