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1.It’simportanttoprovidestudentswithagoodlanguageenvironment./Toprovidestudentswithagoodlanguageenvironmentisimportant.2.Ajournalistwantstointerviewthefirstprizewinnerofthecontest.3.MydreamistobeascientistwhenIgrowup.4.Toimproveherlisteningskills,LifangoftenwatchesTVprograms.①Whichpartsoftheabovesentencesareinfinitivephrases?theblackpartortheredpart?②Whataretheirfunctions,aretheythesubjects,objects,predicativesortheadverbialofthesentences?1.It’simportanttoprovidestudentswithagoodlanguageenvironment.Toprovidestudentswithagoodlanguageenvironmentisimportant.①Whichoftheabovesentencesisbetter?Why?Whatdoes“It”herereferto?Whydoweuse“it”hereinsteadoftheinfinitivephrasesatthebeginningofthesentences?Canyoufindmoresentenceswithinfinitiveassubjects,objects,predicativesortheadverbialsinthetext?动词不定式动词不定式的基本形式是“to+动词原形“,有时可以不带to.动词不定式没有人称和数的变化,在句子中不能作谓语。在句中可以作主语、表语、宾语、宾语补足语、定语和状语。找出句子中的不定式,并说出作用：1.Ittakesyoutenminutestogetthere.2.Ihopetoseehimsoon.3.Hiswishistobecomeanartist.4.Peopleeattolive,butnotlivetoeat.状语表语宾语主语动词不定式作主语Itis+adj.+(forsb.)todosth.Itis+adj.+(ofsb.)todosth.Ittakessb.sometimetodosth.4.用作主语1.TobehereatChristmastimeismydream.2.Togoabroadishisdream.3.Tosayiseasy,todoisdifficult.(这时可将其用形式主语it来替换)→ItismydreamtobehereatChristmastime.→Itishisdreamtogoabroad.→Itiseasytosay,itisdifficulttodo.1.跳舞非常有趣。2.种些植物是非常有必要的。Todanceisalotoffun.Itisalotoffuntodance.Togrowplantsisveryimportant.3.说英语对我来说并不容易。4.听到你的声音真高兴。Tohearyourvoiceissonice.Itissonicetohearyourvoice.TospeakEnglishisnoteasyforme.It’s++(for+sb.)+todosth.It’s+difficult,hard,easy,possible,impossibleimportant,`+(of+sb.)+todosth.clever,wise,kind,good,right,nicewrong,bad,cruelsilly,stupid,foolishcareful,carelessⅧ.e.gItishard___youtodoitwell.=Foryoutodoitwellishard.Itiskind___youtohelpme.=Youarekindtohelpme.forofIt’sclever__himtosayso.Itisimpossible__youtofinishit.Itwaswrong__youtotellalie.Itwascareless___youtomakesomanymistakesintheexam.Itissilly__hertodosuchathing.Itisimportant___youtolearnEnglishwell.offorofofoffore.g•非谓语动词(动词不定式和动词-ing形式)•中考考查重点讲解用作宾语(v.+todo)Iwanttobuyacomputer.Shehopestofindabetterjob.Iwishtogowithyou.•Hehaspromisedtobehavebetterlater.Theboydecidednottobecomeasailor.•Ihopetogotocollege.（want，wouldlike,wish,planhope,agree，learn，seem，decide，choose，promise,,need,refuse,warn,order,advise，allow,expect,fail,manage）+todo1.他想借用我的录音机。2.他们开始读和写。3.李琳喜欢玩什么？她喜欢踢足球。4.你长大了想做什么？Hewantstoborrowmyradio.Theybegantoreadandwrite.WhatsportsdoesLiLinliketoplay?Shelikestoplaysoccer.Whatdoyouwanttobewhenyougrowup?4.Heagreedtohelpus.5.Shechosetostudychemistry.6.Hefailedtopersuadehim.7.Doyouwishtoeatalone?后跟动词不定式和动名词意思一样的动词：starttodo=begintodo=startdoing=begindoinglike/lovetodo接近于like/lovedoinghate/disliketodo接近于hate/dislikedoing•他喜欢游泳。Helikes_________.•我不想打扰你。Idon'tlike________________.todisturbyouswimming1.Maryloves_______________.2.Ihateto_____________________.reading/toreadtrouble/troublinghim后跟动词不定式和动名词意思不一样的动词forgettodo≠forgetdoingremembertodo≠rememberdoingstoptodo≠stopdoingtrytodo≠trydoing3.她忘记寄这封信了。Sheforgot__________________.4.我永远忘不了初次寄信的情景。I'llneverforget_______aletterforthefirsttime.5.Iremember______(see)heronce.=IrememberthatI____(see)heronce.6.Remember________me.=Ihopeyou’llphoneme.topostseeingsawtophoneposting他停下来跟我说话。Hestopped______________.他停止讲话Hestopped_______.她试着写作文。Shetried____________________.totalkwithmetalkingwritingacomposition•他尝试着记下所有单词，可是他失败了。•他尝试着去敲后门。enjoy,finish,keep,mind,suggest,can’thelp，admit,deny,giveup,practise,bebusy,beworth,feellikee.g.1.他对听音乐总是兴致勃勃。Healwaysenjoyslisteningtomusic.2.我打扫完房间了Ihavefinishedcleaningtheroom.3.你不能像这样老变主意。Youshouldn'tkeepchangingyourideaslikethis.+doingsth.II.4.Wouldyoumind__________withyou?5.Hesuggested________forawalk.6.Icouldn'thelp______.mycominggoingoutcrying2.用作宾语补足语：(v.+sb.+todo)Sheaskedmetohelpher.Theteachertoldhimtocomeontime.Edison’smothertaughthimtoreadandwrite.wantsb.todowishsb.todogetsb.todoordersb.todolikesb.todowouldlikesb.todohelpsb.todoadvisesb.todoinvitesb.todosth.promisesb.todoencouragesb.todoallowsb.todosth.make,have,let,see,watch,hear,feel,notice+sb.dosth.e.g.Ican'tmakethehorsego.我无法使这匹马走动。Iwon’thave(允许，容许)yousaysuchthings.我可不许你说这样的话。Mymotherwouldn'tletmegotothefilm.我妈妈不会让我去看电影的。Didyounoticehimleavethehouse?你看到他离开房间了吗？Ioftenhearhimsingthesong.V.作宾语补足语不带to的情况：Letmedoit.Isawhimcrossthestreet.常见动词有：使役动词:let,make,have感官动词:see,watch,hear,feel,listento比较：Iheardhersinginginthenextroom.Iheardhersinginthenextroom.3.用作状语(adverbial)：HecametoshowmehisnewCDplayer.(目的)Iwenttheretoseemyteacher.(目的)ShecamebacktogetherEnglishbook.(目的)Theboywastoofrightenedtomove.(结果)5.用作表语Hisworkistofeedtheanimals.Herjobistolookafterthepatients.Mywishistobeascientist.1.我的工作是每天打扫这间屋子。2.最上策的计划就是马上离开这儿。3.我的梦想就是成为一名科学家。Myworkistocleantheroomeveryday.Thebestplanistoleaveatonce.Mydreamistobeascientist.Givemesomethingtodrink.Ihavetwobookstoread.Theyhavemuchfoodtoeat.Heaskedforaroomtolivein.Idon’thaveapentowritewith.Theiceishardenoughtoskateon.Heboughtatoytoplaywith.6.用作定语(这时不定式与被修饰词有动宾关系。若是不及物动词,介词不能省略)Ⅸ.e.gTheyhadnoroomtolive__