Unit1 When was it invented SectionA课件1

《Unit1 When was it invented SectionA课件1》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、Unit1Whenwasitinvented?Canyoureadthem?012345678910111213141516171819201840163517291632198919231998200820132014160018002000Canyoutellme?Whenwereyouborn?Whenwasyourmotherborn?Whenwasyourbestfriendborn?WhataretheFourGreatInventionsinancientChina?Doyouknow?paper-making造纸术co

2、mpass指南针printing印刷术gunpowder火药造纸术印刷术Lookatthethings.Inwhatorderdoyouthinktheywereinvented?1aA:Ithinkthecalculatorwasinventedbeforethecomputer.B:well,Ithinkthecalculatorwasinventedafterthecomputer.Talkaboutwithyourparterner.Listenandmatchtheinventionswiththedates.1b___18

3、76___1885___1927___1971___1976daecbWhoinventedthecar?_______inventedthecar.KarlBenzKarlBenzThecar____________by______.wasinventedhim1885Whenwasitinvented?Itwasinventedin1885.1876BellWhoinventedthetelephone?Bellinventedthetelephone。ThetelephonewasinventedbyBell.Itwasinve

4、ntedin1876.Sampledialogues:A:Whenwasthetelephoneinvented?B:Ithinkitwasinventedin1876.A:Whenwasthecarinvented?B:Ithinkitwasinventedin1885.Ithinkitwasinventedafterthetelephone.Pairwork1c被动语态（ThePassiveVoice).主动语态与被动语态：英语动词有两种语态,即主动语态(TheActiveVoice)与被动语态（ThePassiveVoice)。

5、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。e.g.1.TheymaketrainsinZhuzhou.TrainsaremadeinZhuzhou.2.Thefarmersgrowcottoneveryyear.Cottonisgrownbythefarmerseveryyear.主动语态被动语态主动语态被动语态e.gManypeoplespeakEnglish.Englishisspokenbymanypeople.主动语态变被动语态的步骤：1、主动语态的宾语变为被动语态的主语；2、主动句的谓语动词变为被动结构

6、；3、主动句的主语变为被动句的宾语，由by引出，当不强调动作的执行者时，常省略。4.其它成分不变。变被动语态时需要注意的事项一变二套三注意宾变主，主变宾，宾语前面by跟，谓语动词变过分，不忘前面be动词跟套时态，主被动时态一致注意因人称的变化而引起的主谓一致问题。各种时态的被动语态的构成：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3.一般将来时态will/am.is.aregoingto+be+过去分词4.过去将来时态would/was.weregoingto+be+过去分词5.现在完成时态

7、have,has+been+过去分词6.过去完成时态had+been+过去分词7.现在进行时态am,is,are+being+过去分词8.过去进行时态was,were+being+过去分词9.含情态动词的情态动词+be+过去分词所有时态的被动语态否定就是在最前面的助动词后加not疑问就是把最前面的助动词提前。ManytreesarenotbeingplantednowAremanytreesbeingplantednow?把下列的句子变为被动语态的句子：1、TheyspeakEnglishinCanada.2、Peopleusedwo

8、odformakingtables.3、TheyaremakingcomputersintheUSA.EnglishisspokeninCanada(bythem).Woodwasusedformakingtables.