grammar:动词不定式一不定式的五种基本形式 主动 被动 一般式 todo tobedone 完成式 tohavedone tohavebeendone 进行式 tobedoing不定式的否定形式:nottodonottohavedonenottobedoingnottobedonenottohavebeendone不定式的进行式、完成式和被动式不定式的进行式由tobeving构成,用来表示谓语动词动作发生时,不定式的动作正在进行。eg。somestudentspretended(read)englishwhentheteachercamein。不定式完成式由tohaveved构成,用来表示动作发生在谓语动作之前。eg。isbobstillperforming?i’mafraidnot。heissaid(leave)thestagealreadyashehasbecomeanofficial。不定式的被动式分为一般式被动tobeved和完成式被动tohavebeenved。当不定式的逻辑主语是不定式所表示的动作的承受者时,不定式要用被动语态。eg。itisanhonourforme(invite)totheparty。thebookissaid(translate)intomanylanguages。allthesegiftsmustbemailedimmediatelyintimeforchristmas。a。inordertohavereceivedb。inordertoreceivec。soastobereceivedd。soastobereceiving二。不定式句法功能1。作主语:tofindatruefriendisdifficult。不定式短语作主语时,可以直接放在句首,但在很多情况下,尤其是在疑问句和感叹句中,往往放在谓语之后,而用先行代词it作形式主语itisdifficulttofindatruefriend。isitdifficulttofindatruefriend?howdifficultitistofindatruefriend!不定式作主语常见句型:a)itisadj。(easy,important,difficult)todosth。b)itisn。(apity,apleasure,one’sduty,ashame)todosth。eg。it’sapleasuretogoshoppingatweekends。c)ittakesneedsrequiressometime(hours,months,days,patience)todosth。eg。itrequirespatiencetobeagoodteacher。2。作表语:当句子的主语是aim,idea,policy,question,suggestion,wish,task,duty,job,purpose等或者主语是what引导的名词性从句时,后面可以用不定式做表语,用以说明主语所包含内容。eg。ourmostimportanttasknowistomakeaplan。注:作表语的不定式都带to,但当主语部分有实义动词do时,to可以省略。eg。theonlythingwecandonowiswaitandsee。3。作宾语theteachersaidremembertobringthebooktomorrow!a)可以直接用不定式作宾语的动词很多,常见的有:agree,afford,tend,ask,decide,determine,expect,fail,hope,learn,intend,manage,offer,plan,promise,refuse,want,wish等当复合宾语中的宾语是不定式时,先用形式宾语it代替不定式,把不定式置于补语之后,即:主语动词it补语todo句式,常用动词有feel,think,find,believe,consider,make等。如:hefeelsithisdutytohelpthepoor。ithinkitdifficulttofindatruefriend。b)不定式一般不作介词的宾语,只有少数介词如but,except等后面可以跟不定式作宾语。一般情况下作介词宾语的不定式都带to,如果but或except前面有do,does,did,todo时,通常省略to。eg。thebushadn’tcome。wehadnochoicebuttowait。wecoulddonothingbutwait。4。宾语补足语在主语谓语宾语宾补句型中,许多动词都可以接不定式作宾语补足语。a)通常作宾语补语的不定式要带to,常用于以下动词之后:ask,tell,advise,allow,permit,enable,expect,force,get,like,order,teach,want,invite,wish,beg等youshouldgetthemtohelpyou。在谓语动词believe,find,think,feel,consider,suppose,imagine,prove等后面跟tobe作宾补,不跟todo,有时tobe可省略weallbelievejohn(tobe)honest。 iconsiderhim(tobe)oneofthebestteachersofno。1middleschool。 但当不定式是完成式时,to不能省略,如:weconsiderhimtohavebeenfoolish。b)以下两类动词后跟不定式作宾补时不能带to使役动词,如:let,have,make等感官动词,如:see,watch,notice,lookat,listento,hear,feel,等don’tletthechildrentroubleyou。iheardsomeoneopenthedoor。但当这两类动词为被动态时,不定式就成了主补。作主补的不定式必须加上tohisfathermadehimgotobedearly。hewasmadetogotobedearlybyhisfather。动词不定式省略to的情况还有:a)wouldrather,hadbetter,whynotdoiwouldrathergoswimming。youhadbettertidyyourbedroom。whynotvisityourcousininjapan?b)当两个动词不定式由and,or,except,but,than,ratherthan相连接时,通常情况下第二个to要省略doyouwanttogoshoppingorwatchafilm?idecidedtowriteratherthanphone。wehadnothingtodobutwatchtv。wehadnochoicebuttowatchtv。(注:一般情况下作介词but,except后接todo,但是如果but或except前面有do,does,did,todo时,通常省略to。)5。作定语不定式可以在句子充当后置定语,修饰名词。以下几类情况常用不定式作定语:能带不定式作宾语的动词,其同源名词可以带不定式作定语。常见的有attempt,decision,promise,plan等eg。hehasn’tkepthispromisetowritetohisparentsregularly。常与不定式搭配的形容词,其同源名词一般可以用不定式作定语。常见的有ability,determination,anxiety,eagerness等eg。hiseagernesstofinishhishomeworkwasquiteclear。序数词、形容词最高级或被only,last,next等修饰的名词可以用不定式作定语:shewastheonlypersontosurviveaftertheearthquake。(tips:不定式在作定语时,有时与被修饰的名词有意义上的主谓关系、同位关系、动宾关系,如果该不定式是不及物动词,它后面需要加上适当介词。)eg。he’salwaysthefirsttocomeandthelasttoleave。主谓关系i’venotimetolistentoyourexcuse。同位关系shehasameetingtoattend。(动宾关系attendameeting)there’snothingtoworryabout。(动宾关系worryaboutnothing)6。作状语作目的状语 (1)istayedtheretoseewhatwouldhappen。 henryhasdecidedtogotothehospitaltobeexaminedbythedoctor。 (2)有时为了强调,不定式前可加inorder或soas。如: bobtookdownmytelephonenumbersoas(inorder)nottoforgetit。 有时为强调目的状语可把inorderto或不定式置于句首,但soasto不能这样用。在这种句式中不定式部分可转换为sothat,inorderthat,成为目的状语从句,如:istayedthereinorder(soas)toseewhatwouldhappen。istayedtheresothat(inorderthat)icouldseewhatwouldhappen。 作原因状语在部分表示感情色彩的形容词、过去分词或动词之后可接不定式,如:astonished,glad,happy,laugh,pleased,sad,smile,sorry,surprised等。 wearegladtohearthenews。 iwassurprisedtoseethatathreeyearoldbabycouldwritesowell。 在部分形容词后接不定式,用主动形式表示被动意义,这种句型中的主语是不定式的逻辑宾语如:thequestionraisedbythestudentisdifficulttoanswer。 theroomisreallycomfortabletolivein。 常这样用的形容词有:easy,difficult,heavy,light,comfortable,fit,impossible等。 作结果状语wecamehomeafterourholidaytofindourgardenneatandtidy。 不定式作结果状语还常用在下列句式中。如: soasto;suchasto imnotsostupid(afool)astoputitinwriting。我不至于愚蠢到会把它写下来。 imnotsuchastupidfoolastoputitinwriting。 enoughto theboyisn’toldenoughtogotoschool。theboyistooyoungtogotoschool。 onlyto用于表示意想不到的结果 janehurriedbackonlytofindhermotherdyinginthehospital。 tooto imtootiredtostayuplonger。 但在下列结构中,tooto并非是太而不能之意。如: imonlytoogladtohavepassedtheexam。考试及格我太高兴了。(too修饰gladtohave,相当于very) wehavetoomuchtolearn。我们要学的太多了(不定式作定语)。 4。不定式短语还可作独立成分,用于句首、句中或句末。如: totellthetruth,theplaywasagreatdisappointmenttome。 常见的短语有tobeexact(确切地说),tobeginwith(首先),todohimjustice(说句对他公道的话),tobesure(真的)等等。eg。totellyouthetruth,idislikeyou。7。作同位语eg。theordertostartthegeneralattacksooncame。不定式的复合结构,以it为形式主语或形式宾语引导的复合结构,如果其前的形容词是指行为的性质就用:forsb。todosth。这种复合结构在句中可作主语、表语、宾语、定语、状语等。itisnecessaryformetolearnenglishwell。如果该形容词是指行为的性质,同时又指行为的人,则用ofsb。todosth。。这种句式中的常用形容词有:right,wrong,brave,careful,careless,clever,wise,stupid,cruel,foolish,good,honest,kind,nice,silly等。eg。it’sverykindofyoutocometoseeme。连接代(副)词不定式(包括whether,what,which,whom,where,when,how,不包括why),在句中起名词的作用,通常跟在诸如tell,know,show,decide,learn,wonder,explain等动词后作宾语,也可作主语或表语。eg。noonecantellmewheretofindjohn。whentostarttheexamisstillunknown。theproblemishowtogetenoughmoney。 动词不定式巩固练习1。iveworkedwithchildrenbefore,soiknowwhatinmynewjob。aexpectedbtoexpectctobeexpectingdexpects2。lateinthemorning,bobturnedoffthealarm。atosleepbsleepingcsleepdhavingslept3。onelearnsalanguagebymakingmistakesandthem。acorrectbcorrectingccorrectsdtocorrect4。themotherdidntknowtoblameforthebrokenglassasithappenedwhileshewasout。whowhenhowwhat5。havingatripabroadiscertainlygoodfortheoldcouple,butitremainswhethertheywillenjoyit。toseetobeseenseeingseen6。itissaidinaustraliathereismorelandthanthegovernmentknows。itwhattodowithwhattodoitwithwhattodowithittodowhatwithit7。howdoyoudealwiththedisagreementbetweenthecompanyandthecustomers? thekeytheproblemistomeetthedemandbythecustomers。 a。tosolving;makingb。tosolving;made c。tosolve;makingd。tosolve;made8。theteacheraskedussomuchnoise。a。don’tmakeb。notmakec。notmakingd。nottomake9。myadvisorencouragedasummercoursetoimprovemywritingskills。aformetakingbmetakingcformetotakedmetotake10。themaninsistedataxiformeeventhoughitoldhimilivednearby。a。findb。tofindc。onfindingd。infinding11。thenewsreportershurriedtotheairport,onlythefilmstarshadleft。atotellbtobetoldctellingdtold12。havingbeenillinbedfornearlyamonth,hehadahardtimetheexam。apassbtopasscpasseddpassing13。ifyouareplanningtospendyourmoneyhavingfunthisweek,betterityou’vegotsomebigbillscoming。a。forgetb。forgotc。forgettingd。toforget14。helenhadtoshoutabovethesoundofthemusic。a。makingherselfhearb。tomakeherselfhearc。makingherselfheardd。tomakeherselfheard15。youweresillynotyourcar。a。tolockb。tohavelockedc。lockingd。havinglocked16。idon’tknowwhetheryouhappen,buti’mgoingtostudyintheu。s。a。thisseptember。atobeheardbtobehearingctoheardtohaveheard17。accordingtoarecentu。s。survey,childrenspentupto25hoursaweektv。a。towatchb。towatchingc。watchingd。watch18。thefluisbelievedbyvirusesthatliketoreproduceinthecellsinsidethehumannoseandthroat。a。causingb。beingcausedc。tobecausedd。behavecaused19。imgoingtothesupermarketthisafternoon。doyouhaveanything?a。tobebuyingb。tobuyc。forbuyingd。bought20。victorapologizedfortoinformmeofthechangeintheplan。a。hisbeingnotableb。himnottobeablec。hisnotbeingabled。himtobenotable21。it’snecessarytobepreparedforajobinterview。theanswersreadywillbeofgreathelp。a。tohavehadb。havinghadc。haved。having22。heglancedoverather,thatthoughshewastiny,sheseemedverywellputtogether。a。notingb。notedc。tonoted。havingnoted23。isendyou100dollarstoday,therestinayear。a。followsb。followedc。tofollowd。beingfollowed24。isbobstillperforming?imafraidnot。heissaidthestagealreadyashehasbecomeanofficiala。tohaveleftb。toleavec。tohavebeenleftd。tobeleft25。ithinkyou’llgrowhimwhenyouknowhimbetter。alikingbtobelikectolikedtobeliking26。whilewatchingtelevision,。athedoorbellrangbthedoorbellringscweheardthedoorbellringdweheardthedoorbellrings27。itwasunbelievablethatthefanswaitedoutsidethegymforthreehoursjustalookatthesportsstars。a。hadb。havingc。tohaved。have28。moreaboutuniversitycourses,call(920)7463789。atofindoutbfindingoutcfindoutdhavingfoundout29。idontwantlikeimspeakingillofanybody,butthemanager’splanisunfair。a。tosoundb。tobesoundedc。soundingd。tohavesounded30。soontheysawtheboyinthecrowd。a。disappearb。todisappearc。disappearsd。disappeared31。didyounoticethelittleboyaway?a。tookthecandyandrunb。takethecandyandrunc。takingthecandyandrund。whotakingthecandyrunning32。iheardhimso。a。saysb。sayingc。sayd。said33。professorblackhaduscompositionseveryfriday。a。towriteb。writtenc。writed。writing34。mrssmithmadeherpupilsthetextthreetimesaweek。a。reciteb。recitedc。recitingd。torecite35。shewasseenmodelshipsintheroom。a。madeb。tomakec。makesd。make36。birdsareseldomheardatnight。a。singb。singingc。tosingd。tobesinging37。theareoplanewasnoticedatsix。a。takeoffb。totakeoffc。getoffd。togetoff38。mrcrossettwasmakehisteachingbecauseofhispoorhealthandoldage。a。giveupb。giveinc。togiveupd。togivein39。thebookissaidintomanyforeignlanguages。a。tohavebeentranslatedb。tohavetranslatedc。tobetranslatingd。havingbeentranslated40。themarquiswasthoughtsometerriblewrongstohistenants。a。ofdoingb。thathehaddonec。tohavedoned。tohavebeendone41。doyouthinkitdifficultahorse?a。totrain,jumpingb。training,forjumpingc。totrain,jumpd。totrain,tojump42。mycarhasbrokendown。wouldyouhelpme?a。togetthecartostartb。getthecarstartc。togetthecarstartedd。gettostartthecar43。heorderedtheroom。a。tosweepb。tobesweptc。shouldsweepd。swept44。telltomandjackeachother。a。notquarrelb。nottoquarrelwithc。tonotquarrelwithd。theynotquarrel45。hewouldlikethemeveryday。a。topracticeb。topractisec。practicingd。practicing46。areyougoingtoleavingnow?unlessyouwouldprefermehere。a。tostayb。willstayc。thati’llstayd。staying47。whatapity!onecannothelpsorryfortheinjured。a。tofeelb。oneselftofeelc。feelingd。oneselffromfeeling48。nothingcouldtheboyfromthetallbuilding。a。prevent,riskingclimbingb。prevent,riskingtoclimbc。stop,riskclimbingd。keep,riskingclimb49。onsundaysipreferathometoout。a。tostay,gob。staying,goc。staying,goingd。tostay,going50。thoughitsoundsabittoodear,itisworth。a。beingboughtb。buyingc。tobuyd。buyingit51。thenoveliswell。a。worthtoreadb。worthbeingreadc。worthytoreadd。worthyofbeingread52。ididn’tfeelgoingoutforawalk。a。sob。asc。ratherd。like53。you’dbetterherthesadnewsnow。a。nottotellb。won’ttellc。nottelld。don’ttell54。i’dratherlosethegame。a。nottohurthimb。nothurthimc。thantohurthimd。thanhurthim55。alicesaystonight,becausetherewillbeanexamtomorrowmorning。a。she’drathernotgob。she’dnotrathergoc。she’llrathernotgod。shewon’trathergo56。tomdidnothingbutbackwhathehadsaid。a。takenb。tookc。takingd。take57。thereseemednothingelsetodobutadoctor。a。tosendforb。sendforc。callford。tocallin58。iusuallygotherebytrain。whynotbyboatforachange?a。totrygoingb。tryingtogoc。totryandgod。trygoing59。haveianychoicebutasyoutellme?a。todob。doc。doingd。i’lldo60。wouldyouliketogowithusforapicnictomorrow?yes,。a。iwouldlikeb。i’dliketogoc。i’dloved。i’dliketo答案:130bababcbddcbdadbdccbcdacacccaaa3160bccabcbcacdcb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