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U9动词不定式定义构成用法动词不定式是非谓语动词的一种，它没有人称和数的变化，在句子中不能独立作谓语，但它仍保持动词的特点，既可以有自己的宾语和状语。动词不定式的构成：to+动词原形动词不定式的用法动词不定式具有名词、形容词和副词的特征。因此在句中可以做主语、表语、宾语、宾语补足语、定语和状语。本单元学习不定式做宾语和宾语补足语。功能：作宾语补足语作宾语动词不定式作宾语后面能接不定式作宾语的动词有：agree,begin,like,love,prefer,start,ask,choose,decide,forget,hope,learn,study,remember,try,plan，want,wish,wouldlike，dare等。如：注意我们希望天黑以前到那儿。Wehopetogettherebeforedark.那个姑娘决定自己做那件事。Thegirldecidedtodoitherself.动词不定式作宾语的注意事项（2点）1．有些动词既可跟不定式作宾语，也可跟动名词作宾语，但含义不同：2．不定式作宾语时，如带有宾语补足语，则要把不定式放到后面，用it作形式宾语，构成“主语+动词+it+宾补（形容词、名词）+不定式”结构。remembertodorememberdoingforgettodoforgetdoingstoptodostopdoinggoontodogoondoingIrememberseeingyousomewherebefore.记住要做某事；记得曾经做过某事忘记要做某事忘记曾经做过某事停下来去做某事停止做某事继续做另一件事继续做原来在做的事我记得以前在哪儿见过你。Pleaseremembertoturnoffthelightwhenyouleave.离开时请记得关好灯。动词不定式作宾语的注意事项（2）如：Hefounditverydifficulttogettosleep.他发现很难入睡。我们都觉得今天告诉他这个消息是很重要的.Weallthinkitimportanttotellhimthenewstoday.你觉得爬上这座山难吗?Doyouthinkitdifficulttoclimbthemountain?动词不定式作宾语补足语1．后面能接to不定式作宾语补足语的动词有：show,ask,order,teach,tell,want,wish,help,leave,hate,get,choose,advise,wouldlike等。老师要我们做练习一。我要你们俩去。我们帮助她修理自行车。TheteachertoldustodoExercise1.Iwantbothofyoutogo.Wehelpedher(to)repairherbike.动词不定式作宾语补足语2．使役动词let,have,make及感官动词see,watch,notice,hear,feel,find等要以不带to的不定式作宾补。Let’shavearest.我们休息一会吧。Isawhimcomein.我看见他进来了。感官动词后既可跟不带to的不定式作宾补，也可跟v-ing作宾补，前者表示动作的全部过程已结束；后者表示动作正在进行。Isawhimcomedownstairs.我看见他下了楼。（说明他下楼了这件事）Isawhimcomingdownstairs.我看见他在下楼。（说明他下楼时的情景）注意1)动词不定式的否定形式动词不定式的否定式是在to前加not；不带to的不定式则在动词前加not.如：ZhangMingaskedmenottostayathomeallday.张明要我不要整天呆在家里。Mymotherletmenotdoitbymyself.妈妈让我不要独自做这件事。2)疑问词+不定式形式Letmetellyouwheretogonow.我不知道怎样回答你的问题.Idon’tknowhowtoansweryourquestion.我想知道该怎样做.我想知道该做什么.Iwanttoknowhowtodoit.Iwanttoknowwhattodo.()1.Thepolicemantoldtheboy______akiteinthestreet.A.notflyB.don’tflyC.doesn’tflyD.nottofly()2.Hereisyourhat.Don’tforget________whenyou_______.A.toputiton,leaveB.toputonit,leaveC.puttingonit,willleaveD.puttingiton,willleave()3.Hisgrannywasverytired.Shehadtostop_______arest.A.haveB.tohaveC.havingD.had()4.Theradioistoonoisy.Askhim_____________.A.turnitupB.turnitdownC.toturnitdownD.turnsitup()5.Hewanted_______acomputer.A.tobuyB.boughtC.buyD.buying()6.Lookout!Thetrafficismovingfast.It’s_____dangerous____crosstheroad.A.very,toB.so,toC.much,toD.too,to()7.Johnis_________climbthehighwall.A.toobravetoB.enoughbravetoC.braveenoughtoD.sobraveto()8.Whatmakesit________upanddown?A.moveB.tomoveC.movedD.movesDABCADCA选择题动词填空1.Heoftenseeshispupils_______(play)footballontheplayground2.Pleasetellyoursister_________(come)herequickly.3.Hermothertoldher____________(notread)inbed.4.Hefoundithard__________(catch)upwithhisclass.5.LiMingwastootired,sohestopped______(have)arest.6.Remember______(tell)himaboutitbeforehegoesaway.7.Let’s_______(watch)themplaybasketball,shallwe?8.Iwant________(take)thesebookstotheclassroom.9.Hemadefaces_________(make)thebaby_________(stop)crying.playtotellnottoreadtocatchtohavetotellwatchtotaketomakestopExercise：1改错AThebabywantscry.Theboyhadgoseeadoctor.LiuYisawyoutotakethebowaway.Theteachertoldthestudentstonotmakeanynoise.Wefoundtheexercisedifficultdowithouttheteacher’shelp.BHewasverygladwenttotheGreatWall.Marytriedherbestnotshowheranger.Tellthetruth,Idon’twantspeakanything.Mr.WangmadeMinghuatodohisexercisesaagain.Ireallydon’tknowhowanswerit.Iwentthere___him.A.tosawB.seeingC.andseeD.toseeEnglishisnoteasy___.A.learningB.learntC.tolearnD.learnHemustbeveryrich___it.A.tobuyB.buyingC.andboughtD.andbuyItis___difficulttounderstand.A.soB.veryC.tooD.quiteLastsummerItookacourseon____.A.howtomakedressesB.howdressesbemadeC.howtobemadedressesD.howdressestobemadeHedidnottellme__todonext.A.whatB.howC.whenD.whereTellhim___.A.notcomeB.notcomingC.nottocomeD.tonotcomeI’dlike___atalkwithyou.A.tohaveB.havingC.haveD.hadIsawMary___thehouse.A.openthedoorandcomeinB.toopenthedoorandcomeC.openthedoorandtogointoD.openthedoorandwentinYou’lldowell___moreslowly.A.tospeakB.speakingC.andspeakD.speak2选择AB