unit6 when was it invented 全单元PPT

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1、SectionAUnit9Whenwasitinvented?1a---1c练习:用be动词的正确形式填空.Aknife_________usedtocutapples.2.Theair_________pollutedalready.3.Therooms________cleanedlater.4.Thestudents_______askedtohavebreakfast.5.They_______encouragedtostudyhardinthepast.6.NotonlyhebutalsoI__

2、___punishedlastnight.ishasbeenwillbearewerewas观察:be动词有______,_______和_______的变化.时态人称数用所给词的正确形式填空1.Toomuchwaterbyhimeveryday.(drink)2.FiveapplesbyTomeveryday.(eat)3.I____often________byher.(help)4.She____often______byme.(hit)isdrunkareeatenhelpedishitam被动语

3、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)。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.Thefarmersgrowriceeveryyear.Riceisgrownbythefarmerseveryyear.主动语态被动语态主动语态被动语态主动语态改被动语

4、态:Bellinventedthetelephonein1876.wasbyThepassivevoice.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

5、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

6、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、Peopleusedwoodformakingtables.3、TheyaremakingcomputersintheUSA.EnglishisspokeninCanada(bythem).Woodwasusedformaking

7、tables.ComputersarebeingmadeintheUSA.把被动句变否定Computersaren’tbeingmadeintheUSA.4、TheyhavegrownriceinSouthChina.5.Wemustplantmoretreesnextyear.6.Iamgoingtocleanourclassroomtomorrow.Moretreesmustbeplantednextyear.Ourclassroomisgoingtobecleanedtomorrow.Ricehas

8、beengrowninSouthChina.把被动句变疑问.HasricebeengrowninSouthChina？常用的被动语态短语bemadeoffromintobeusedtodofordoingas由--制成的看出原材料看不出原材料原材料制成成品befilledwithbecoveredwitheg.1.Paperismadewood.from2.Tablesaremadewood.3.Woodismadepaper