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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。,构成：to+do(动词原形),用法：用作宾语(v.+todo)Iwanttobuyacomputer.Shehopestofindabetterjob.Iwishtogowithyou.needtodolearntodoagreetodoplantododecidetodorefusetodobegintodostarttodotrytodoforgettodoremembertodoliketodoStoptodogoontodo,2.用作宾语补足语：(v.+sb.+todo),Sheaskedmetohelpher.Theteachertoldhimtocomeontime.Edisonsmothertaughthimtoreadandwrite.wantsbtodowishsbtodogetsbtodoordersbtodofindsbtobelikesbtodowouldlikesbtodohelpsbtodo,作宾语补足语不带to的情况：,常见动词有：一感：feel二听：listento,hear三让:let,make,have四看:see,lookat,watch,notice比较：Isawhercrossingthestreet.Isawhercrossthestreet.,3.用作状语(adverbial)：,Iwenttheretoseemyteacher.ShecamebacktogetherEnglishbook.Theboxwastooheavytomove.,(目的),(目的),（结果）,4.用作主语,1.Tobeanactressismydream.,2.Togoabroadishisdream.,3.Tosayiseasy,todoisdifficult.,（这时可将其用形式主语it来替换）,Itismydreamtobeanactress.,Itishisdreamtogoabroad.,Itiseasytosay,itisdifficulttodo.,句型,Its+adj+ofsb+todosth.Eg:你能邀请我，你真是太善良了。Itsverykindofyoutoinvitme.若形容词是描述人的性格、品质的，如kind，good，nice，right，wrong，clever，careless，polite，foolish等，用ofsb.Eg:你真聪明，解出了这道数学题。Itscleverofyoutoworkoutthemathsproblem.,Its+adj+forsb+todosth.若形容词是描述事物的性质，用forsb.这类形容词有difficult，easy，hard，important，dangerous，（im）possible等。Eg:对孩子们来说，穿过繁忙的街道很危险。Itsverydangerousforchildrentocrossthebusystreet.Eg:对我们来说，完成这项工作很困难。Itsdifficultforustofinishthework.,5.用作表语,Hisworkistofeedtheanimals.,Herjobistolookafterthepatients.,Mywishistobeascientist.,6.用作定语,Givemesomethingtodrink.,Theyhavemuchfoodtoeat.,（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）,Heaskedforaroomtolivein.,Idonthaveapentowritewith.,7.疑问词who,what,which,where,when,how加todo可构成不定式短语，在句中可用作主语、宾语、宾语补足语、表语等。,Whentostarthasnotbeendecided.,Idontknowwhattodo.,Hecantellyouwheretogetthebook.,Thequestioniswho(m)toask.,(主语),(宾语),(宾语补足语),(表语),比较（Compare）,Idontknowwhattodo.Idontknowhowtodoit.Idontknowwhattodoaboutit.,说出句子中的不定式，及在句中做什么成分：,Ittakesyoutenminutestogetthere.Ihopetoseehimsoon.Hiswishistobecomeanartist.Peopleeattolive,butnotlivetoeat.Ihavealottotellyou.Itsnotrighttobealwaysthinkingofoneself.Weoftenseehimplayfootball.,定语,主语,状语,表语,宾语,主语,宾语补足语,Exercise,跳舞非常有趣。种些植物是非常有必要的。说英语对我来说并不容易。听到你的声音真高兴。,Todanceisalotoffun.,Itisalotoffuntodance.,Togrowplantsisveryimportant.,Tohearyourvoiceissonice.,TospeakEnglishisnoteasyforme.,Itissonicetohearyourvoice.,Exercise,我的工作是每天打扫这间屋子。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.,Exercise,他想借用我的录音机。他们开始读和写。李琳喜欢玩什么？她喜欢踢足球。你长大了想做什么？,Hewantstoborrowmyradio.,Theybegantoreadandwrite.,WhatsportsdoesLiLinliketoplay?Shelikestoplaysoccer.,Whatdoyouwanttobewhenyougrowup?,1我有许多书要看。2她有几个问题要问。3他有一台电视要修。4.我没什么可担心的。,Ihavemanybookstoread.,Shehasafewquestionstoask.,HehasaTVsettorepair.,Ihavenothingtoworryabout.,他是一个值得信赖的人。6爱迪生是第一个发明电灯的人。7他那生病母亲最多可活三个月。,Heisamantobelievein.,Edisonwasthefirstmantoinventthelights.,Hissickmotherhasthreemonthstoliveatmost.,Theylookedforhimeverywhereandfoundhim_underthetree.a.liesb.lyingc.layd.lain,考点：see/hear/find/watchsb.dosth.(看见某人做了某事）See/hear/find/watchsb.doingsth.（看见某人正在做某事）,Isawhim_thesupermarketjustnow.a.enteredb.enteringc.enterd.toenter,Thegirlwhosoldmatcheswasfound_thenextmorning.a.dieb.dyingc.diedd.dead,-Doyouremember_mesomewhereinHangzhou?-Yes.Ithinkthats2yearsago.a.seeb.seeingc.toseed.saw,forget/remembertodosth.forget/rememberdoingsth.stop/goontodosthstop/goondoingsth,Thescientiststopped_tomethoughhewasbusy.a.talkingb.totalkc.tohavetalkd.havingtalk,Themoreyouthinkaboutit,themorequestionsyouwillthinkof_.a.askb.askedc.askingd.toask,考点：todo表示目的,Thedoctordidwhathecould_thatchild.a.saveb.tosavec.savedd.saving,Ihavenopen_.a.writingb.writingwithc.towritewithd.writing,todo作定语，如是不及物动词构成不定式短语作定语，其后需接介词,
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