初中英语语法不定式解析.docx

初中英语语法不定式解析不定式省to有四种情况：使役动词let,have,make等后接不定式。如：Lethimgo!让他走!wouldrather，hadbetter后。如：Youhadbetterstayathome.你最好呆在家里。Why.../whynot...后。如：WhynothaveagoodrestonSunday?为什么星期天不好好休息一下呢?感官动词see,watch,lookat,hear,listento,smell,feel,find等后作宾补，省to。如：Isawhimdance.我看见他跳舞。注意：这些情况在被动句中可千万不可省to哟!如：Thebossmadethemworkthewholenight.变成被动句：Theyweremadetoworkthewholenight.不定式的特殊用法：It与不定式：动词不定式可以做主语，但如果动词不定式太长，显得头重脚轻的，那么我们就可用形式主语it代替，而把真正主语(即不定式)放于句尾。如:ItisnotdifficultformetostudyEnglishwell.(对我来说学好英语是可能的。)不定式还可以充当句子的宾语，但有些动词，如find，think，believe等，在语法上不能接受不定式作宾语，只有用it作形式宾语，从而把动词不定式置于句尾。这样的不定式可继续充当其宾语的作用。如:Ifounditdifficulttofallasleep.我发现很难入睡。还有一点：动词不定式，还可用在how，when，where，what，which等疑问代词或副词之后，与其共同作宾语。如：Idon'tknowhowtouseacomputer.我不知道怎样使用电脑。Remember?too...to...和enough...to：too...to表达"太...一致于不能..."。enough...to表达"足以..."。这两个词组的用法用两个例子就可以说清楚了。Theboxistooheavyformetolift.这个箱子太沉了，我提不动。Heisoldenoughtogotoschool.他到上学的年龄了。也就是说，他的年龄足够上学了。记住这两个句子就可以举一反三，应用自如。你记住了吗?好吧，再试一把趁热打铁!练习：1.Tellhim___thewindow.A.toclosenotB.nottocloseC.tonotcloseD.notclose2.Pauldoesn'thavetobemade___.Healwaysworkshard.A.learnB.tolearnC.learnedD.learning3.You'dbetter_______thestoryinJapanese.A.sayB.speakC.tellD.talk4.Thepatientwaswarned___oilyfoodaftertheoperation.A.toeatnotB.eatingnotC.nottoeatD.noteating5.----Iusuallygotherebytrain.----Whynot___byboatforachange?A.totrygoingB.tryingtogoC.totryandgoD.trygoing6.Therearesomebooksonthefloor,wouldyoulike________?A.topickthemupB.topickupthemC.pickitupD.pickupit7.Sheisveryill,let's_______adoctoratonce.A.towakeupB.sendforC.topayforD.payfor8.Iwant________ateacherwhenIgrowup.A.tobeB.toC.beD.being9.It'scoldhere.You'dbetter______yourcoat.A.nottakeoutB.nottotakedownC.nottakeoffD.nottotakeaway10.Mymothertoldme________morewater.A.drinkingB.drankC.todrinkD.drink实战：1.You'dbetter_______readinthesun.A.nottoB.notC.don'tD.to2.Youaren'tanewdriver,areyou?_______.A.No,IamB.Yes,I'mnotC.No,youareD.Yes,Iam3.MustIstayherenow?_________.A.No,youmustn'tB.No,youneedn'tC.Yes,youcanD.Yes,youmay4.Thereis