初中英语被动语态讲解及练习1ppt课件

.,PassiveVoice被动语态,.,英语动词有两种语态：主动语态和被动语态。1.当我们不知道谁是动作的执行者,2.或者只需强调动作的承受者时，要用被动语态。,被动语态结构：,be+过去分词(PP)+(by),.,表格：被动态基本结构,am/is/aredone,was/weredone,(shall/will/begoingto)bedone,have/hasbeendone,.,情态动词的被动语态,情态动词+be+donemustbedone/mustntbedoneshouldbedone/shouldntbedonecanbedone/cantbedonemaybedone/mightbedone,.,各种时态的被动语态构成1）一般现在时：Youareinvitedtodothis.2）一般过去时：Thestorywastoldbyher.3）一般将来时：Theproblemwillbediscussedtomorrow.,看一看想一想,.,4)情态动词：Therubbishcanbeputintothedustbinoverthere.,.,在改写中应注意：1.把原来的宾语提到前面作被动语态的主语;2.把动词变成“be+过去分词”;3.主动语态中的主语变为介词by的宾语。,ManypeoplespeakChinese.,Chineseisspokenbymanypeople.,.,Heplantstreesinspring.,主,谓,宾(受动者),Trees,areplanted,by,him,改为被动语态,inspring.,.,Tomwillcleantheroomtomorrow.,主,谓,宾(受动者),Theroom,willbecleaned,by,Tom,tomorrow.,.,Hisbrotherwashesbowlseveryday.,主,谓,宾(受动者),Bowls,arewashed,by,hisbrother,everyday.,.,1.Peopleuseknivesforcuttingthings.Knives_forcuttingthings.2.Thestudentscleanthewindowsoftheirclassroomtwiceamonth.Thewindowsoftheirclassroom_twiceamonth.,EXERCISES,areused,are,cleaned,(变被动语态）,.,3.Ifoundtheticketonthefloor._onthefloor.4.Itoldhertoreturnthebookintime.She_toreturnthebookintime.,Theticketwasfound,wastold,.,5.Hisdoctormadehimhaveonlytwomealsaday.He_onlytwomealsaday.6.Nowpeoplecanusecomputerstohelpthem.Nowcomputers_tohelpthem.,wasmadetohave,canbe,used,.,10.TheteacheraskedTomtoturnonthecomputer.Tom_toturnonthecomputer.11.Inthisfactorywomendomostofthework.Mostofthework_bywomeninthisfactory.,wasasked,isdone,.,12.Hecanmendthebikeintwodays.Thebike_intwodays.13.Youmusttakethismedicinethreetimesaday.Thismedicine_threetimesaday.,canbemended,mustbe,taken,.,14.ThestudentsstudyGermaninthisschool.German_bythestudentsinthisschool.15.Dotheyoftentalkaboutthisquestion?_thisquestionoften_about_?,isstudied,Is,talked,bythem,.,1)Teenagersshould_(allow)togooutatnight.2)Thetelephone_(invent)byBell.3)English_(speak)inChina.4)Thecar_(make)inChina.5)Theroommust_(clean)everyday.,beallowed,wasinvented,isspoken,ismade,becleaned,.,Oralpractice-主动句改被动句,Oralpractice-1.Changeeachsentenceintopassivevoice:Acarknockedhimdownyesterday.Thesetwokidsplanttreeseveryyear3)Weshouldprotecttheearth4)WellputontheplaynextSunday,Hewasknockeddownbyacaryesterday,Treesareplantedbythesetwokidseveryyear.,Theearthshouldbeprotectedbyus.,TheplaywillbeputonbyusnextSunday.,.,几种特殊结构1.Myunclegavemeagiftonmybirthday2.Weoftenhearhimplaytheguitar,Agiftwasgiventomeonmybirthday.Heisoftenheardtoplaytheguitar注意1：see,watch,hear,notice,feel,make,listento,lookat等动词/短语后作宾语补语的不定式都不带to；但改成被动语态后必须带to。Beseentodo,bemadetodo,beheardtodo,bewatchedtodo,.,Weshouldlookaftertheoldpeople.Theoldpeopleshouldbelookedafterbyus.,注意2：有些不及物动词加介词构成及物动词短语，如果变被动语态，不能把动词后的介词丢掉。,.,注意3：主语+连系动词+表语的句子没有被动语态。Thefoodtastesdelicious.注意4：therebe结构没有被动语态,.,1。动词(表示主语的属性特征)+副词(well/badly/easily/smoothly),用主动式表被动义。,read,write,sell,wash,clean,wear,lock,open,cook,shut,dry,eat,drink,Thebooks_wellA.weresoldB.sellC.havesoldD.arebeingsoldThiskindofcloth_easilyA.haswashedB.waswashedC.washesD.iswashed,B,C,主动式表被动义,.,7.Didyouplantmanytreesatthistimelastyear?_atthistimelasttime?8.Mustwefinishourworktoday?_ourwork_today?,Weremanytreesplanted,Mustbefinished,.,9.Theforeignfriendsgaveussomewonderfulstamps.1)_somewonderfulstamps.2)Somewonderfulstamps_.,weweregiven,were,giventous,.,(