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Theinfinitive动词不定式todozxxkwnottodo作主语todo作主语，常放句尾，用it作形式主语1.Itbeadj.\n.todosth.组卷网It’sgoodtoseeyou.Toseeistobelieve.2.Ittakessb.sometimetodosth.It’sdifficulttolearnmathswell.Exercise1跳舞非常有趣。2种些植物是非常有必要的。3说英语对我来说并不容易。4听到你的声音真高兴。Todanceisalotoffun.Itisalotoffuntodance.Togrowplantsisveryimportant.Tohearyourvoiceissonice.TospeakEnglishisnoteasyforme.Itissonicetohearyourvoice.作表语Toseeistobelieve.他的愿望是成为一名医生。Hiswishistobeadoctor.Exercise1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.作宾语(v.+todo)Iwanttobuyacomputer.Shehopestofindabetterjob.Iwishtogowithyou.needtodolearntodoagreetodoplantododecidetodorefusetodobegintodostarttodotrytodoforgettodoremembertodoliketodostoptodogoontodoExercise1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?作宾语补足语：(v.+sb.+todo)Sheaskedmetohelpher.Theteachertoldhimtocomeontime.Edison’smothertaughthimtoreadandwrite.wantsbtodowishsbtodogetsbtodoordersbtodofindsbtobelikesbtodowouldlikesbtodohelpsbtodo1他要求我再大声点儿。2Lucy告诉他不要哭。3吉姆告诉李明由衷地祝福每个人。4他让我再做一次。Sheaskedmetospeaklouder.Lucytoldhimnottocry.JimtoldLiMingtogivehisbestwishestoeverybody.Heletmedoitagain.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.作状语(adverbial)：HecametoshowmehisnewCDplayer.Iwenttheretoseemyteacher.ShecamebacktogetherEnglishbook.Theboywastoofrightenedtomove.(目的)(目的)(目的)(结果)Iamgladtoseeyou.（原因）I’msorrytotroubleyou.（原因）作定语Haveyougetanythingtosay?He’slookingforaroomtolivein?Shehasnoclothestowear?用作定语Givemesomethingtodrink.Ihavetwobookstoread.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.Idon’thaveapentowritewith.Theiceishardtoskateon.Heboughtatoytoplaywith.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.5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.不定式与疑问词连用常用动词有:askknowlearnteachtellunderstand等。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.Idon’tknowwhattodo.Hecantellyouwheretogetthebook.Thequestioniswho(m)toask.构成形式作用例句whowhatwhichhow等＋todowherewhen主语Whentostarthasnotbeendecided.表语Thequestioniswheretogo.宾语Idon’tknowhowtodo.宾补Nobodytolduswhattodo.