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学习目标1.掌握被动语态的用法2.掌握如何将主动语态变成被动语态英语的两大语态：主动语态和被动语态A.主动语态中主语是谓语动词的发出者。宾语是谓语动词的对象。B.被动语态中主语是谓语动词的承受者(动作的对象)。被动语态的谓语构成:助动词be＋动词过去分词语态：表示主语和谓语动词之间的关系。什么时候要用被动语态呢？在下列三种情况之一要用被动语态：①不知道动作的执行者是谁，用被动语态。②没有必要指出谁是动作的执行者，用被动语态。③需要强调动作的承受者时，用被动语态主动语态和被动语态结构的转换：•Wecleanourclassroomeveryday.Ourclassroomiscleaned主语谓语宾语byuseveryday结构：主动语态：主语＋谓语＋宾语被动语态：主语be+过去分词by+宾语即:、主变宾、宾变主,谓语动词变被动。”(注:主变宾即主语变为介词by宾语)[注意]①把主动语态改为被动语态时，句子的时态不能变。且be动词和新主语保持一致。如上例，所给的主动句子是一般现在时，改为被动语态时，也要用一般现在时。②如果主动句中的主语是人称代词，改为被动句时作介词by的宾语，要用宾格。如上例中的主语we改为us。归纳总结方法把主动语态改为被动语态可按“、、”来进行。即：①变－－－把主动语态的宾语改为被动语态的主语，把主动语态的主语改为被动语态的介词by的宾语。②套－－－根据原句的时态套用相应时态。③注意－－注意人称的变化而引起的主谓一致问题。例：①ManypeoplespeakEnglish.Englishbymanypeople.②Hewashedhisshoesyesterday.Hisshoesbyhimyesterday.isspokenwerewashed一变二套三注意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•TheyplayfootballonSunday.•Lucydoesthehomeworkintheevening.•Theyoftenusecomputersinclass.•WemakethesemachinesinBeijing.FootballisplayedbythemonSunday.ThehomeworkisdonebyLucyintheevening.Computersareoftenusedbytheminclass.ThesemachinesaremadeinBeijing.Helookedafterthelittlebabyyesterday.主谓宾(受动者)Thelittlebabywaslookedafterbyhimyesterday.2.Theyboughttencomputerslastterm．Tencomputerswerebought(bythem)lastterm.一般过去时：S+was/were+过去分词•Theybuiltthetallbuildinglastyear.•Hetookgoodcareofhislittlebrotheryesterday.•Wecleanedourclassroomjustnow.•Theyusedthisroomforresting.Thetallbuildingwasbuiltbythemlastyear.Hislittlebrotherwastakengoodcareofbyhimyesterday.Ourclassroomwascleanedbyusjustnow.Thisroomwasusedforrestingbythem.Tomwillcleantheroomtomorrow.主谓宾(受动者)TheroomwillbecleanedbyTomtomorrow.3.Theywillfinishtheworkintendays.Theworkwillbefinished(bythem)intendays.一般将来时：S+will+be+过去分词•Wewillhaveasportsmeetingnextweek.•Childrenwilltakesomephotosintheschoolyardtomorrow.•Theheadmasterwillgiveatalkthisafternoon.Asportsmeetingwillbehadbyusnextweek.Somephotoswillbetakenbychildrenintheschooltomorrow.Atalkwillbegivenbytheheadmasterthisafternoon.4．AmycantakegoodcareofGina．GinacanbetakengoodcareofbyAmy.情态动词：S+can/may/must/should+be+过去分词1.Hecantakecareofthebaby.2.Lucymaydrawthepictures.3.Youmustturnoffthelights.4.TheyshouldlearnEnglishwell.Thebabycanbetakencareofbyhim.ThepicturemaybedrawnbyLucy.Thelightsmustbeturnedoffbyyou.Englishshouldbelearnedwellbythem.Exercises：1.ManypeoplespeakEnglish.2.Peopleusedknivesforcuttingthings.3.Wecanusetheboxasatable.4.Weshouldcleantheclassroomeveryday.5.Shewillrepairthebiketomorrow.下列时态的被动语态构成1.Lucyiswateringthetrees.2.Wehavefinishedourcompositions.Someworkersarepaintingtheroomsnow．Theroomsarebeingpaintedbysomeworkersnow.现在进行时：S+am/is/are+being+过去分词Wehavemadetwentymorekeys．Twentymorekeyshavebeenmadebyus.现在完成时：S+have/has+been+过去分词各种时态的被动语态构成一般现在时：一般过去时：一般将来时：情态动词：过去进行时现在完成时：S+am/is/are+doneS+can/may/must/should+be+doneS+will+be+doneS+was/were+being+doneS+have/has+been+doneS+was/were+done各种时态的被动语态构成在被动语态中要注意的问题一些使役动词(let,have,make等)或感官动词(see,hearwatch,notice等)在主动语态中后面接的动词不定式不带to，但改为被动语态时，要补上to。如：A.Thebossmakestheworkerswork18hoursaday.—Theworkersaremadetowork18hoursadaybytheboss.B.Isawhimenterthehouse.—Hewasseentoenterthehousebyme.C.Theteacherletthemleavetheclassroomafterclass.—Theywerelettoleavetheclassroombytheteacherafterclass.D.Wehearhersingintheroomeveryday.—Sheisheardtosingintheroomeveryday.[注意]当使用see/hear/watchsbdoingsth时，变为被动语态时，doing保持不变。如：Isawhimgoingintotheshop.(主动)Hewasseengoingintotheshop.(被动)使役动词和感观动词主被动语态对照表主动语态被动语态使役动词makesbdosthsbbemadetodosthhavesbdosthsbbehadtodosthletsbdosthsbbelettodosth感观动词seesbdosthsbbeseentodosthwatchsbdosthsbbewatchedtodosthhearsbdosthsbbeheardtodosthnoticesbdosthsbbenoticedtodosthgo•Atrafficaccident_________(happen)justnow.happened2.连系动词（Link.v.)如：be,look,seem,feel,sound,smell,taste,get,turn,become…•PekingOpera________(sound)beautiful.sounds3.当此动词表示事物的自然属性的时候:•Thepen_________(write)veryfast.writes•Thiskindofsweater_______(sell)well.sells1.不及物动词（vi.)如:happen,takeplace,appear,disappear,…不用被动语态的动词：把下列主动句改为被动句①Lilywritesmanyletterseveryday.(主动)②Theyvisitedthisfarmlastyear.（主动）③Wehavelearned3000Englishwordssofar.（主动）→ManylettersarewrittenbyLilyeveryday.→Thisfarmwasvisitedbythemlastyear.→3000Englishwordshavebeenlearnedbyussofar.把下列主动句改为被动句1.Theboycleanedthedeskamomentago.Thedeskwascleanedbytheboyamomentago.2.Wewillplant2000treesnextyear.2000treeswillbeplantedbyusnextyear.3.Youmustkeeptheroomcleanandtidy.Theroommustbekeptcleanandtidybyyou.4.Thepolicehavecaughtthethief.Thethiefhasbeencaughtbythepolice.5.Thefarmersarecuttingdownthetreesonthehill.Thetreesonthehillarebeingcutdownbythefarmers.•1.ShewaterstheflowerseverydayTheflowerseveryday.arewateredbyher3.Theydotheirhomeworkafterschool.Theirhomeworkisdonebythemafterschool.2.Iboughtacomputerlastterm．Acomputerwasbought(byme)lastterm.4.Ourstudentsmustn’tsmokecigarettes.Cigarettesmustn’tbesmokedbyourstudents.5.ChinesepeoplebuilttheGreatWallmanyyearsago.TheGreatWallwasbuiltbyChinesepeoplemanyyearsago.FillintheblankswiththePassiveVoice.1、Tea_______(grow)inFujian.2、Chinese__________(speak)inCh