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1、动词不定式动词不定式:非谓语动词的一种，在句中不能单独用于谓语。构成：to+动词原形1.做主语：常表示没有发生的动作，谓语动词用单数形式。Toseeistobelieve.眼见为实。Toknowoneselfisdifficult.人贵有自知之明。_________isonethingand_______isanother.说是一回事，做是另外一回事。※it做形式主语：将it作为形式上的主语，而将真正的主语不定式置于句末，使句子结构显得平衡一些。It’s+adj.+forsb.+todosth.It’s+adj.+ofsb.+todosthItisuseful______a
2、foreignlanguage_______tous.A.tolearn,forB.tolearn,ofC.learningofIt’srude____you____treatanoldmanlikethat.A.of,toB.for,toC.for,ofIt______me3days_______theprogram.A.took,finishingB.took,tofinishC.spent,finishing2.作表语：说明主语的具体内容或表示目的，常指没有发生的事情。Hisplanistoearnagreatdealofmoney.Hiswishis______ag
3、oodjob.A.findingB.tofindC.lookingfor3.不定式作定语，通常放在其修饰的名词或代词之后。Doyouhavesomethingtosay?4NowIhavesomethingimportanttotellyou.1.动词不定式做状语，表示行为，目的，结果，原因，条件等。Iamverysorrytohearthatyourmotherisill.Heisoldenoughtogotoschool.2.动词不定式做宾语补足语。这样的及物动词有：ask,advise,want,force,allow,tell等Justtellyourwifetow
4、ashthemgentlyincoldwater.Heasksmetobuyagiftforhim.Theyoungmanadvisedmetogetanotherjob.3.一些动词的后面常跟动词不定式做宾语，其中有：want,hope,begin,start,decide,plan,manage等Iwanttodosomeshopping.Idecidedtogohome.Idon’tknowwhattodo.有些动词的后面有复合宾语时，常用it做形式宾语，而将真正宾语的不定式短语放在宾语补足语之后。find,think,consider,feel,make等。Ifin
5、diteasytolearnEnglishforme.4.疑问词后面接不定式，构成不定式短语。Wheretogoisstillaquestion.ThequestionishowtolearnEnglishwell.Iknowwheretofindtheboy.Exercises:1.Wecan’tdecidewhat_____forSue’sbirthday.A.buyB.buyingC.tobuyD.tobebought42.Tothedoctor,themostimportantthingis_____lives.A.savedB.tosaveC.save3.I’mh
6、ungry.Pleasegivemesomething_______.A.eatB.eatingC.toeatD.aten4.Herwishis______anengineer.A.becomingB.becomeC.tobecome5.Helovesparties.Heisalwaysthefirst______andthelast________.A.coming,leavingB.tocome,toleaveC.comes,leaves6.Theproblemisn’teasy_________A.workingoutB.tobeworkedoutC.toworkit
7、outD.toworkout7.Heistilllookingforahouse_________.A.toliveinB.toliveC.livingD.lived8._____iseasierthandoing.A.TalkingB.TalkC.TalkedD.Totalk9.Weareoftentold___atpeoplewhoareintrouble.A.nottolaughB.tonotlaughC.notlaughD.laughingnot10.Itisveryimportant___us____En
