不定式是动词的一种非限定形式不定式是动词的一种非限定形式,,由“由“tto+o+动词原形”构成动词原形”构成,,没有人称和数的变化没有人称和数的变化,,在句中不能独立作谓语在句中不能独立作谓语..但不定式具有名词、但不定式具有名词、形容词和副词的特征，在句中可以作形容词和副词的特征，在句中可以作主语主语、、宾语宾语、、宾语补足语宾语补足语、、表语表语、、定语定语、、状语状语等。等。复习不定式（复习不定式（RevisetheInfinitiveRevisetheInfinitive））1.Itisgood1.Itisgoodtohelptohelpothers.others.2.Itismyambition2.Itismyambitiontomaketomakesurethatthesurethatthedisabledpeopleinourneighborhooddisabledpeopleinourneighborhoodhaveaccesstoallpublicbuildings.haveaccesstoallpublicbuildings.3.Myambitionis3.MyambitionistoworktoworkinthecomputerinthecomputerindustrywhenIgrowup.industrywhenIgrowup.辨别下面不定式在句子中充当的成分辨别下面不定式在句子中充当的成分::(subject)(subject)(subject)(subject)(predicative)(predicative)4.Idon’thavetime4.Idon’thavetimetosittositaroundfeelingaroundfeelingsorryformyself.sorryformyself.5.Iamtheonlystudentinmyclass5.Iamtheonlystudentinmyclasstotohavehaveaapetsnake.petsnake.6.Abigcompanyhasdecided6.Abigcompanyhasdecidedtobuytobuyitfromitfromme.me.7.Myfellowstudentshavebegun7.MyfellowstudentshavebeguntoaccepttoacceptmeforwhoIam.meforwhoIam.(attribute)(attribute)(attribute)(attribute)(object)(object)(object)(object)8.Ihavehadtoworkhard8.Ihavehadtoworkhardtolivetoliveanormallianormallife.fe.9.SomedaysIamtootired9.SomedaysIamtootiredtogettogetoutofbed.outofbed.10.Wemustcallonlocalgovernment10.Wemustcallonlocalgovernmenttotogivegivefinancialassistancetodisabledfinancialassistancetodisabledpeoplpeople.e.(adverbial)(adverbial)(adverbial)(adverbial)(objectcomplement)(objectcomplement)不定式在句中的功能不定式在句中的功能(1)(1)做主语做主语::那样做是很幼稚的那样做是很幼稚的..Toactlikethatischildish.Toactlikethatischildish.为避免句子出现“头重脚轻”现象为避免句子出现“头重脚轻”现象,,常用常用itit做做形式主语形式主语,,将真正主语的不定式后置将真正主语的不定式后置..要学好英语不是那么容易的。要学好英语不是那么容易的。Ex.ItisnoteasytolearnEnglishwell.Ex.ItisnoteasytolearnEnglishwell.(2)(2)做宾语做宾语她喜欢谈论这件事情。她喜欢谈论这件事情。Ex.Shelovestotalkaboutthematter.Ex.Shelovestotalkaboutthematter.他希望不久能找到工作他希望不久能找到工作..Hehopestofindajobsoon.Hehopestofindajobsoon.常接不定式做宾语的动词有：常接不定式做宾语的动词有：afford,agreafford,agree,aim,arrange,ask,attempt,begin,bother,e,aim,arrange,ask,attempt,begin,bother,care,choose,continue,dare,decide,demand,care,choose,continue,dare,decide,demand,expect,fail,hate,hope,learn,long,manage,expect,fail,hate,hope,learn,long,manage,mean,need,offer,plan,prefer,prepare,promean,need,offer,plan,prefer,prepare,promise,prove,refuse,want,wishmise,prove,refuse,want,wish等等<1>.<1>.不定式有时和连接代不定式有时和连接代//副词一起构成宾语副词一起构成宾语..Ex.Doyourememberwhichwaytogetthere?Ex.Doyourememberwhichwaytogetthere?下一步干什么你决定了吗下一步干什么你决定了吗??Haveyoudecidedwhattodonext?Haveyoudecidedwhattodonext?我来问他怎么样开这机器我来问他怎么样开这机器..I’llaskhimhowtooperatethemachine.I’llaskhimhowtooperatethemachine.<2><2>有时不定式由有时不定式由whetherwhether引起引起..Ididn’tknowwhethertolaughorcryaboutit.Ididn’tknowwhethertolaughorcryaboutit.<3>feel,find,judge,make,think,believe,consi<3>feel,find,judge,make,think...
