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Todothatsortofthingisfoolish。Iwanttoseeyouthisevening.Allyouhavetodoistofinishitquickly.Wefoundahousetolivein.ShecameheretostudyEnglish.Iwarnedthepatientnottoeatcoldwateraftertheoperation.主语宾语表语定语状语宾补一、用法1.作主语2)用it作形式主语用不定式(It+be+adj./n.+todosth)意思相当于Todosth＋be+adj./n.)3)例外句型（请记住）：Itisnogood/nouse/nohelp+doingsth.Itisnousearguing（争论）aboutit.1)注意：常用动名词而不是动词不定式作主语e.g.LearningEnglishisveryimportant.e.g.ItisimportanttolearnEnglish.Itisapity(遗憾)tohavemadesuchamistake.2.作宾语1)只跟todo的动词，常见的有：learn/agree/ask/plan/hope/wish/decide/want/need……e.g.Shehopestofindabetterjob.Iwishtogowithyou.Iwanttoeatmeatforlunch.Shehopestomeetherparents.特殊用法：sthneed/want/requiredoing=sthneed/want/requiretobedone某事需要被做3.作宾语补足语：1）ask类（v+sbtodosth）want/wish/wouldlike2）感官动词类（V+sb.+dosth.）see/hear/notice/find/watch/hear/feel/smell…Ioftenhearthemsingthesonginthenextroom.Wewatchedthemplayfootball.e.g.1Sheaskedmetohelpher.2Theteachertoldhimtocomeontime.3老师要学生们按时做家庭作业。Theteacherwantsthestudentstodothehomeworkontime.e.g.Theteacherletmeanswerthequestion.但这些动词用于被动结构时，省去的to要加上。Theywereheardtosingapopsong.Hewasmadetoanswerthequestion.3）使役动词类（V+sb.+dosth.）make/let/have…练习：1.Hewasmade_________.A.goB.goneC.goingD.togo2.Thoughhehadoftenmadehislittlesister_____,todayhewasmade_____byhislittlesister.A.cry；tocryB.crying；cryingB.cry；cryD.tocry；cry注意B.动词不定式的否定式只须在to前加not.Myfatherdecidednottotakeupthejob.Theteachertoldusnottobelateagain.注意C.带疑问词的动词不定式在to前加疑问词。Mr.Linwillteachushowtousethecomputer.Canyoutellmewheretogetthebook?Idon’tknowwhattodo.Idon’tknowhowtodo.注意D.作简短回答或避免不必要的重复时，动词不定式常常省去to后面的动词，只保留to。A:Wouldyouliketocometomyparty?Marywantedtousemybike,butIaskedhernotto(usemybike).B:Yes,I’dloveto(cometoyourparty).Mary想用我的自行车，但我叫她别用。4.作表语doing表习惯性动作；todo表将来一次性性动作Mywishistobecomeascientist.MyjobisteachingyouEnglish.5.作语不定式：作目的、结果（only之后）和原因（v./adj.之后）分词：作时间、条件、伴随、结果和原因（句首）不定式作目的状语：不定式用作目的状语时，其句意特点很明显，通常在译成中文时可用“为了”来表示。Tohelpthepanda,thegovernmenthasmadeanewplan.（2005.福建卷）—Cantheprojectbefinishedasplanned?—Sure,______itcompletedintime,we’llworktwomorehoursaday.A.havinggotB.togetC.gettingD.get（2005.广东卷）—Hehurriedtothestationonly______thatthetrainhadleft.A.tofindB.findingC.foundD.tohavefound（2005.重庆卷）Daddydidn’tmindwhatweweredoing,aslongasweweretogether,_____fun.A.hadB.haveC.tohaveD.having6.作定语todo将来的主动动作，tobedone表将来的被动动作1Ihavetwobookstoread.2Haveyougotanythingtosay?3He’slookingforaroomtolivein.4Idon’thaveapentowritewith.5Ihaveclothestowash,anddoyouhaveclothestobewashed?6Thequestiontobediscussedisveryimportant.练习1.Frankisthekindofpersonwhopeopleliketo________.A.makefriendwithB.makefriendsofC.makefriendsD.makefriendswith2.Theworkerworksveryhard.Sheisalwaysthefirst_____andthelast_____.A.come,leaveB.coming,leavingC.tocome,toleaveD.tocome,leaving•解析：由only,last,next,序数词或形容词最高级修饰的名词常用不定式做定语。再如：•Sheisalwaysthefirststudenttoarriveatschool.二、动词不定式的形式一般式：todo（表将来）一般被动式：tobedone进行式：tobedoing（表正在进行）完成式：tohavedone（表已经完成）完成被动式：tohavebeendone否定式:nottodo三、疑问词+动词不定式用作主语、宾语等。Whentostarthasnotbeendecided.Idon’tknowwhattodo.Hecantellyouwheretogetthebook.Idon’tknowhowtodoit.四、动词不定式的复合结构：1)forsb.todosth2)(Itis+性格adj+)ofsb.todosth性格adj：nice,kind,cruel,thoughtful,careful,careless…ItisveryimportantforustolearnEnglish.Itisdifficultforhimtofinishthetaskinsuchashorttime.Itisveryniceofyoutohelpme.Itwascarelessofhimtomakesuchamistake.练习1.Fillintheblankswiththeproperformsoftheverbsgiven.1.Itisveryhardforyou____________(understand)thisstory.2.After__________(think)everythingover,shedecided______________(notsend)herletter.3.Hedidnotwant_______(see)him.4.Isawhim_____(cry)intheclassroom.5.Lether_____(do)herhomeworkherself.tounderstandthinkingnottosendtoseecrydo翻译1.我的梦想是成为一名科学家。Mydreamistobeascientist.2.为了赶车，我早早地起床了。(Inorder)tocatchthebus,Igotupearly.3.我不喜欢被盯着看.Idon’tliketobestaredat.4.不要逐个单词地翻译。Trynottotranslateeveryword.