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被动语态讲解一、被动语态的构成形式1.被动语态的基本时态变化被动语态通常为十种时态的被动形式,被动语态由be+过去分词构成,be随时态的变化而变化。以do为例,各种时态的被动语态形式为:1)am/is/are+done(过去分词)一般现在时例Visitorsarerequestednottotouchtheexhibits.2)has/havebeendone现在完成时例Allthepreparationsforthetaskhavebeencompleted,andwe'rereadytostart.3)am/is/arebeingdone现在进行时例Anewcinemaisbeingbuilthere.4)was/weredone一般过去时例IwasgiventenminutestodecidewhetherIshouldrejecttheoffer.5)hadbeendone过去完成时例Bytheendoflastyear,anothernewgymnasiumhadbeencompletedinBeijing.6)was/werebeingdone过去进行时例AmeetingwasbeingheldwhenIwasthere.7)shall/willbedone一般将来时例Hundredsofjobswillbelostifthefactorycloses.8)should/wouldbedone过去将来时例Thenewswouldbesenttothesoldier'smotherassoonasitarrived.9)shall/willhavebeendone将来完成时(少用)例TheprojectwillhavebeencompletedbeforeJuly.2.被动语态的特殊结构形式1)带情态动词的被动结构。其形式为:情态动词+be+过去分词。例Thebabyshouldbetakengoodcareofbythebaby-sitter.2)有些动词可以有两个宾语,在用于被动结构时,可以把主动结构中的一个宾语变为主语,另一宾语仍然保留在谓语后面。通常变为主语的是间接宾语。例Hismothergavehimapresentforhisbirthday.可改为Hewasgivenapresentbyhismotherforhisbirthday.3)当“动词+宾语+宾语补足语”结构变为被动语态时,将宾语变为被动结构中的主语,其余不动。例Someonecaughttheboysmokingacigarette.可改为Theboywascaughtsmokingacigarette.4)在使役动词have,make,get以及感官动词see,watch,notice,hear,feel,observe等后面不定式作宾语补语时,在主动结构中不定式to要省略,但变为被动结构时,要加to。例Someonesawastrangerwalkintothebuilding.可改为Astrangerwasseentowalkintothebuilding.3.非谓语动词的被动语态v.+ing形式及不定式todo也有被动语态(一般时态和完成时态)。例Idon'tlikebeinglaughedatinthepublic.二、Itissaidthat+从句及其他类似句型1Itissaidthat…据说,Itisreportedthat…据报道,Itisbelievedthat…大家相信,Itishopedthat…大家希望,Itiswellknownthat…众所周知,Itisthoughtthat…大家认为,Itissuggestedthat…据建议。例Itissaidthattheboyhaspassedthenationalexam.(=Theboyissaidtohavepassedthenationalexam.)三、谓语动词的主动形式表示被动意义1.英语中有很多动词如break,drive,lock,open,sell,read,write,wash等,当它们被用作不及物动词来描述主语特征时,常用其主动形式表达被动意义,主语通常是物。例Thiskindofclothwasheswell.注意:主动语态表被动强调的是主语的特征,而被动语态则强调外界作用造成的影响。试比较:Thedoorwon'tlock.(指门本身有毛病)Thedoorwon'tbelocked.(指不会有人来锁门,指“门没有锁”是人的原因)2.表示“发生、进行”的不及物动词和短语,如:happen,takeplace,c