1被动语态（一）语态：英语的语态是通过动词形式的变化表现出来的。英语中有两种语态：主动语态和被动语态。主动语态表示主语是动作的执行者。例如：ManypeoplespeakChinese.谓语：speak的动作是由主语manypeople来执行的。被动语态表示主语是动作的承受者，即行为动作的对象。例如：Chineseisspokenbymanypeople.主语English是动词speak的承受者。（二）被动语态的构成被动语态由“助动词be＋及物动词的过去分词”构成。人称、数和时态的变化是通过be的变化表现出来的。现以speak为例说明被动语态在各种时态中的构成。一般现在时：am／is／are＋spoken一般过去时：was／were＋spoken一般将来时：will／shallbe＋spoken现在进行时：am／is／arebeing＋spoken过去进行时：was/werebeing＋spoken现在完成时：have／hasbeen＋spoken过去完成时：hadbeen+spoken（三）被动语态的用法（1）不知道或没有必要说明动作的执行者是谁。例如：Somenewcomputerswerestolenlastnight.一些新电脑在昨晚被盗了。（不知道是谁偷的）Thisbridgewasfoundedin1981.这座桥竣工于1981年。（2）强调动作的承受者，而不强调动作的执行者。例如：TheglasswasbrokenbyMike.玻璃杯是迈克打破的。Thisbookwaswrittenbyhim.这本书是他写的。Yourhomeworkmustbefinishedontime.你们的家庭作业必须及时完成。（四）主动语态变被动语态的方法（1）把主动语态的宾语变为被动语态的主语。（2）把谓语变成被动结构（be＋过去分词）（根据被动语态句子里的主语的人称和数，以及原来主动语态句子中动词的时态来决定be的形式）。（3）把主动语态中的主语放在介词by之后作宾语，将主格改为宾格。例如：Allthepeoplelaughedathim.→Hewaslaughedatbyallpeople.Theymakethebikesinthefactory.→Thebikesaremadebytheminthefactory.Hecutdownatree.→Atreewascutdownbyhim.（五）含有情态动词的被动语态含有情态动词的主动句变成被动句时，由“情态动词＋be＋过去分词”构成Wecanrepairthiswatchintwodays.→Thiswatchcanberepairedintwodays.Theyshoulddoitatonce.→Itshouldbedoneatonce.2（六）特殊情况1.Hemadetheboyworkfortwohoursyesterday.→Theboywasmadetoworkbyhimfortwohoursyesterday.2.MotherneverletsmewatchTV.→IamneverlettowatchTVbymother.3.JackgavePeteraChristmaspresentjustnow.→（1）AChristmaspresentwasgiventoPeterbyJackjustnow.→（2）PeterwasgivenaChristmaspresentbyJackjustnow.常见的句型结构：Itis(was)agreed(believed/decided/hoped/thought......）that......大家同意（相信、决定、希望、认为）......Itis(was)wellknownthat......众所周知Itis(was)takenforgrantedthat......被视为当然Itmustberememberedthat......务必记住......Itmustn’tbeforgottenthat......千万别忘记......Itis(was)said(reported，heard，told，suggested)that......据说(报道、听说、告知、建议......)二、典型例题（）1．TheOlympicGames___________everyfouryears.AareheldBwereheldC．areholdingD．willho1d（）2.Intheartshow，alotofenjoyment__toforeignfriendsbytheChinesepaintings．A．isgivingBisgivenCwillgiveDhasgiven（）3.TodayChineseisbecomingmoreandmorepopular.It_________in.manyschoolsaroundtheworld.A.teachesB.isteachingC.hastaughtD.istaught（）4.BaJin,oneofthegreatestwritersinChina,________as"People'sWriter".A.isregardedB.hasregardedC.isregardingD.regards（）5.Usuallycomputers_________tosearchtheInternet.A.useB.areusingC.areusedD.used（）6.--Doyouoftencleanyourclassroom?--Yes.Ourclassroom__________everyday.A.cleanB.cleansC.iscleaned（）7.一DidyouhearthatwaterinTaiLakesmeltterrible?一Yes．Infact，it____.That'sallbecauseofthepeopleandthefactoriesaround．A．pollutedBwaspollutedChaspollutedD．waspo11ute（）8.--Ourenvironmentisgettingworsethanbefore.--You'reright.ButthankstoEarthDay_______,peoplehavedonemoreandmoreusefult...
