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Passivevoice被动语态基本用法当句子的主语是动作的执行者时，谓语的形式是主动语态。当句子的主语是动作的承受者时，谓语要用被动语态。被动语态由助动词be+过去分词构成，时态通过be表现出来。be+Vp.p(动词的过去分词）1)be动词可以随时态人称的变化而变化am/is/are+V(过去分词）was/were+V(过去分词）willbe+V(过去分词）情态动词+be+V(过去分词）1.规则动词的过去分词：1)一般情况在动词原形后加-edwatch---watched2)以不发音e结尾的加-dpractice---practiced3)以辅音加y结尾的，去y变i加-edstudy---studied4)以重读闭音节结尾，末尾只有一个辅音字母，先双写该辅音字母，再加-edstop---stopped2.不规则动词的过去分词：amisarebeenhavehashaddodonewritewrittengogoneHeplantstreesinspring.主谓宾(受动者)Treesareplantedbyhim改为被动语态inspring.主动语态变被动语态口诀：宾语提前主语变，原主变宾by后见，时态人称be关键。Tomwillcleantheroomtomorrow.主谓宾(受动者)TheroomwillbecleanedbyTomtomorrow.Hisbrotherwashesbowlseveryday.主谓宾(受动者)Bowlsarewashedbyhisbrothereveryday.1.Theymakeshoesinthatfactory.主语+及物动词+宾语Shoesaremade(bythem)inthatfactory.一般现在时：S(主语）+am/is/are+过去分词2.Theyboughttencomputerslastterm．Tencomputerswerebought(bythem)lastterm.一般过去时：S+was/were+过去分词3．AmycantakegoodcareofGina．GinacanbetakengoodcareofbyAmy.情态动词：S+can/may/must/should+be+过去分词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.4)情态动词：Therubbishcanbeputintothedustbinoverthere.时态主动语态被动语态一般现在时V(原形)/V(e)sam/is/are+Vpp一般过去时V-ed/madewas/were+Vpp一般将来时will+V(原形)will+be+Vpp含情态动词情态动词+V(原形)情态动词+be+Vpp各种时态的被动语态构成一般现在时：一般过去时：情态动词：一般将来时：现在进行时：现在完成时：过去进行时：S+am/is/are+P.PS+was/were+P.P.S+can/may/must/should+be+P.P.S+will+be+P.P.S+am/is/are+being+P.P.S+have/has+been+P.P.S+was/were+being+P.P.何时使用被动语态呢？一、行为主体不明确，不必说出或者无法说出动作的执行者时。例如：Footballisplayedallovertheworld．二、不易找到或根本就不可能找到动作的执行者时。例如：Mybikewasstolen．我的自行车被盗了。三、汉语中含有“据说”、“据悉”、“有人说”、“大家说”等时。例如：Itissaidthatonedayheclimbedtothetopofahouseand……ItwasreportedthathermotherdiedofSARS.众所周知……Itiswellknownthat…据推测说……Itissupposedthat…四、汉语中含有“被”、“由”等词时。例如：TinaisaskedtocomebyPaul．Tina是被Paul叫来的。五、某些句子习惯上用被动语态。例如：HewasborninOctober，1989．1.Peopleuseknivesforcuttingthings.Knives____________forcuttingthings.2.Thestudentscleanthewindowsoftheirclassroomtwiceamonth.Thewindowsoftheirclassroom_____________twiceamonth.areusedarecleaned(变被动语态）3.Ifoundtheticketonthefloor.________________________onthefloor.4.Itoldhertoreturnthebookintime.She_____________toreturnthebookintime.Theticketwasfoundwastold5.Hisdoctormadehimhaveonlytwomealsaday.He___________________________onlytwomealsaday.6.Nowpeoplecanusecomputerstohelpthem.Nowcomputers___________________tohelpthem.wasmadetohavecanbeused7.Didyouplantmanytreesatthistimelastyear?___________________________atthistimelasttime?8.Mustwefinishourworktoday?_______ourwork_____________today?WeremanytreesplantedMustbefinished9.Theforeignfriendsgaveussomewonderfulstamps.1)____________________somewonderfulstamps.2)Somewonderfulstamps_____________________________.weweregivenweregiventous10.TheteacheraskedTomtoturnonthecomputer.Tom_______________toturnonthecomputer.11.Inthisfactorywomendomostofthework.Mostofthework_______________bywomeninthisfactory.wasaskedisdone12.Hecanmendthebikeintwodays.Thebike___________________intwodays.13.Youmusttakethismedicinethreetimesaday.Thismedicine______________________threetimesaday.canbemendedmustbetaken14.ThestudentsstudyGermaninthisschool.German_______________bythestudentsinthisschool.15.Dotheyoftentalkaboutthisquestion?______thisquestionoften_______about______________?isstudiedIstalkedbythem1)Teenagersshould_____(allow)togooutatnight.2)Thetelephone_____(invent)byBell.3)English____(speak)inChina.4)Thecar____(make)inChina.5)Theroommust_____(clean)everyday.beallowedwasinventedisspokenismadebecleaned()Theflowers____everyday,orthey’lldie.AmustwaterBcanbewateredCshouldwaterDmustbewatered()Manycomputerswill___toourschool.AbebringBbebroughtCbring4.Theywillfinishtheworkintendays.Theworkwillbefinished(bythem)intendays.一般将来时：S+will+be+过去分词5.Someworkersarepaintingtheroomsnow．Theroomsarebeingpaintedbysomeworkersnow.现在进行时：S+am/is/are+being+过去分词6．Wehavemadetwentymorekeys．Twentymorekeyshavebeenmadebyus.现在完成时：S+have/has+been+过去分词7．Iwasdoingmyhomeworkat8:00lastnight．Myhomeworkwasbeingdone(byme)at8:00lastnight.过去进行时：S+was/were+being+过去分词1.Bikesaremadeofmetal.2.Myshirtisboughtbymymother.3.Thebridgewasbuiltin1951.4.Theworkwillbefinishedtomorrow.5.Teenagersshouldbeallowedtosmoke6.Theflowersmustbewateredeveryday.