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1、培训资料（8）动词不定式动词不定式在句子中的作用：动词不定式是由S+动词原形构成，在句屮起名词，形容词和副词的作用，可以担任除谓语以外的其它任何成分。1动词不定式作主语：Tomastalanguageisnotaneasything.掌握一门语言不是一件容易的事情。ToteachEnglishismyfavorite.教英语是我的爱好。Itsmypleasuretohelpyou.很乐意帮助你。动词不定式作主语时可以放在后面，而用i(作形式主语放在原主语的位置上。It'sverykindofyoutohavegivenusmuchhelp.你给了
2、我们那么多的帮助真是太好了。It'snecessarytofindthewitness.冇必耍找到目击者。Ittookmetwohourstogetthere.Ifs+careful(clever,kind,good,right,wrong等)+ofsb・+todosth.It*s+difficult(easy9hardJmportant：interesting等)+forsb.+todosth.Ittakessb.sometime+todosth..2动词不定式作宾语：某些及物动词可以用动词不定式作宾语，这些动词有：主语+decide,begi
3、n,help,begin,want,wish,like,forget,learn,ask,hope,agree,choose,fail”,+todosth.IliketohelpothersifIcan.如杲有可能的话，我喜欢帮助别人。Sheagreetogetsomeonetohelpher.主语+think(make,find,feel,consider等)+it+形容词(名词)+todosth.IfounditveryimportanttolearnEnglishwell.Ithinkitourdutytodoeverythingwell.
4、.3动词不定式作宾语补语。主语+ask(tell,get,wish,like,want,teach,know等)+sb.+todosth.Weexpectyoutobewithus.我们希望你和我们在一起。Pleaseaskhimtocomeherequickly.请叫他快过来。4动词不簸作表语:WhatIshoulddoistofinishthetasksoon.我应该做的是赴快完成任务。Themosturgentthingistofindtheboyimmediately.当务Z急是马上去找孩子。5动词不定式作定语：Therearemanyw
5、aystosolvetheproblem.冇许多方法能解决这个问题。Ihavesomethingimportanttotellyou.我有重要的事情要告诉你。Iwanttohaveabighousetolivein.6不定式作状语：Wewenttothehospitaltoseeourteacher.我们去医院看了我们的老师。SheismakingatesttogetakindofusefulmedicinefromaTibetflower.她在做试验，从一种西藏花屮捉取某种冇用的药物。too+形容词(副词)+(forsb.)+todosth.・
6、・・+形容词(副词)enough+todosth.to/inorderto/soasto+doTheboyistooyoungtogotoschool.==Theboyisnotoldenoughtogotoschool.==Theboyissoyoungthathecan'tgotoschool.Hegotupearlyinthemorninginordertocatchuptheearlybus.=Hegotupearlyinthemorningsothat/inorderthathecouldcatchtheearlybus.主语+be+h
7、appy(glad,pleased,angry,sorry,careful,ready,nice，lucky，等)+todosth.(be+adj•+todo)Fmgladtoseeyouagain.Emsorrytohearthat.7.动词不定式的否定形式：not+to+动词原形Theteachertoldusnottoswiminthatriver.老师告诉我们不要在那条河里游泳。It'sunfairnottotellus.没告诉我们真是不公平。8带疑问词的不定式：疑问词”who,what,which,when,where,how,why+
8、todo”可以加在不定式的前面，构成不定式短语，使含义更加具体。Wheretogoisnotknownyet.去什么地方述不知道。Ido
