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1、动词不定式时态与语态不定式todotobedonetobedoingtohavedonetohavebeendonetohavebeendoing--------------------(1).Theypretendednottoseeus.(2).Hepretendedtobesleeping.(3).Shepretendedtohaveknownitbefore.(一般式表示与谓语的动作同时/几乎/发生在它之后.)(在谓语动词发生的同时,不定式的动作也正在进行)(完成式表示动作发生在谓语动作之前)(4).We’rehapp
2、ytohavebeenworkingwithyou.(完成进行式表示谓语动作发生之前,不定式的动作一直在进行而且可能之后也继续)1.作主语2.作宾语3.作宾语补足语4.作定语5.作状语6.作表语7.作独立成分8.与疑问词等连用用法/功能Toseeistobelieve.It’simportanttolearnEnglishwell.(1).主语Myjobtohelpthepatient.Yourtasktocleantheclassroom.isis(2).表语Theworkersdemandedtogetbetterpay.
3、Ifounditnecessarytotalktohimagain.(3)宾语think/consider/findit+adj.+todo常用动词不定式作宾语的动词有:hope,refuse,learn,setoutchoose,decide,agree,manage,pretend,plan.Iexpectyoutogivemesomehelp.(4).宾补五看watchseelookatobservenotice三使letmakehave二听listentohear一感觉:feelwarn,tell,allow,help
4、,ask,force等e.g.Imadehimdohiswork.Hewasmadetodohiswork(byme).注意1>help后面的“to”可省去e.g.Theyoftenhelpthegrandma(to)carrywater.2>see,hear,watch,feel,notice,lookat等表示感觉和let,make,have等表示使役的动词后面,不定式作宾语时要省“to”(注:被动语态不省to)3>不定式用在介词but,except,besides后时,如果这些介词前有行为动词do的各种形式,那么介词后的
5、不定式不带to,相反则带to.(1).Shecoulddonothingbutcry.(2).Ihavenochoicebuttogo.(3).Whatdoyouliketodobesidessleep.Ihavesomethingtosay.Hehasalotofhomeworktodo.Heislookingforaroomtolivein.Thereisnothingtoworryabout.(5).定语(如果不定式中的动词是不及物动词,则不定式中要有介词.)Pleasegivemeapentowritewith.不定式
6、作定语时,应放在被修饰词的后面1.不定式做定语与所修饰的词之间有三种关系:(1)动宾关系Ihavealotofworktodo.(2)主谓关系Heisalwaysthefirsttocome.(3)同位关系Weallhaveachancetogotocollege.2.something,anything,nothing,everything等复合不定代词常用不定式做后置定语。e.g.Doyouhaveanythingtosend?Icameheretoseeyou.Hegotupearlytocatchthetrain.(6
7、)状语(表示目的或结果)inorderto,soasto,enoughto,onlyto,too….to.,在一些短语中也有体现(7).独立结构tobefrank,tobehonest,Totellthetruth,Idon’tagreewithyou.类似的结构(8)不定式与疑问词who,which,when,how,what等连用,在句中起名词作用,可充当主语、表语、宾语等。Hedidn’tknowwhattosay.(宾语)Howtosolvetheproblemisveryimportant.(主语)Myquestio
8、niswhentostart.(表语)注意:在与why连用时,只用于why或whynot开头的简短疑问句中,后面紧跟的动词不定式不带to。Whynothavearest?exerciseMyteacherwasmade_____histeachingbecauseofpoor