unit 13 we are trying to save the earth-被动语态

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1、PassiveVoiceUnit13Wearetryingtosavetheearth一、何时使用被动语态1.不知道谁是动作的执行者或没有必要Paperismadefromwood.Hewaswoundedinthefight.2.需要强调动作的承受者时Booksandnewspapersinthereadingroommustn'tbetakenaway.Hewasawardedfirstprizeinthatcontest.3为了使语气婉转，避免提及自己或对方而使用被动语态，或由于修饰的需要，使用被动语态，使句子得以更好

2、的安排。Theconstructionofthenewlabmustbecompletedbytheendofnextmonth.Electricityisusedtorunmachines.Discusion:theactivevoice主动语态&thepassivevoice被动语态什么时候用主动语态或被动语态？主动语态和被动语态的动词结构是怎样的？3.主动语态句子变成被动语态句子哪三个部分要变？怎么变？语态动词时态结构主动语态被动语态一般现在时一般过去时什么时候用主动语态或被动语态？主语是动作的执行者就用主动语态主语是

3、动作的承受者就用被动语态WestudyEnglishatschool.Englishisstudiedbyusatschool.我们用木头做家具。那只老鼠被猫抓住了相机是用来照相的。Discusion1:theactivevoice主动语态&thepassivevoice被动语态主动语态被动语态被动语态语态动词时态结构theactivevoicethepassivevoice一般现在时一般过去时amis+p.p.arewas+p.p.werevv+sesp.t.Discusion2:theactivevoice主动语态&th

4、epassivevoice被动语态Wecallthedoctor.Peopledon’tplayfootballhere.Thetruckwascleanedyesterday.Decideifthesesentencesareactiveorpassive.MrChenteachesusEnglish.Theclassroomwascleaned.activeactivepassiveactivepassiveExercise：1.Thekey______forlockingtheclassroomdoor.A.usesB

5、.isusedC.isusingD.use2.Anewschool_______overtheretwoyearsago.A.builtB.wasbuiltC.buildD.builds3.Thelostchild______onOctober7,1998.A.wasfoundB.isfoundC.foundD.find4.AtalkonChinesehistory________intheschoolhallyesterday.A.isgivenB.giveC.wasgivenD.gaveBBACDisscusion3:t

6、heactivevoice主动语态&thepassivevoice被动语态主动语态句子变成被动语态句子哪三个部分要变？怎么变？1.把原句的宾语改为主语。2.把原句的谓语动词改为被动语态结构(be+p.p.)。3.把原句的主语改为by的宾语（用宾格）,可省略。e.g.Shecleanedtheroom.Theroomwascleaned(byher).1.Theyplaybasketballintheirschool.(改为被动语态)Basketball_____________intheirschoolbythem.ispl

7、ayed2.Thenaughtyboybrokethewindow.Thewindow_____________bythenaughtyboy.3.PeoplespeakEnglishallovertheworld.English_____________bypeopleallovertheworld.Exercise：wasbrokenisspokenExercise：translatethefollowingsentences这些照片是上星期拍的。这本书是鲁迅写的。史密斯一家被邀请参加了派对。Thesephotoswer

8、etakenlastweek.ThisbookwaswrittenbyLuXun.TheSmithswereinvitedtotheparty.Summary：什么时候用主动语态或被动语态？主动语态和被动语态的动词结构是怎样的？3.主动语态句子变成被动语态句子哪三个部分要变？怎么变？语态动