不定式在句子中可做主语

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1、不定式在句子中可做主语、宾语、表语、定语、状语和宾语补语。1)不定式做主语一般表示具体的某次动作。【例如】Tocompletethe30storiedbuildinginoneyearwasquiteadifficulttask.Todothatimpliestakingresponsibility.当主语较长，谓语较短时，常用it做形式主语，而将不定式放到谓语的后面。【例如】Itisimportantformodernyoungpeopletomasteratleasttwoforeignlanguages.It做形式主语，不定式放在谓语动词之后常用于下列结构中：a)Itis＋形

2、容词(easy,important,difficult,foolish,inconvenient,unnecessary,right,wrong...)＋(for/ofsb.)＋不定式【例如】ItisessentialtoreserveatableinadvanceofChristmasEve.Itishardtoputmyhopessintoswords.Itisnoteasytocatchfishwithyourhandsonly.ItisimportantforusyoungpeopletolearnEnglishandmasterit.b)Itis＋名词(apleasure,

3、apity,apleasantthing,one'sduty,anhonor,ashame,acrime,noeasyjob...)＋不定式Itisasheerwasteoftimetoreadthatkindoftrash.Itisapitytohavetogowithouther.Itisagloriousdeathtodieforthepeople.c)Ittakes(sb.)sometime(hours,months,days,alotoftime,patience...)＋不定式IttakesmethreehourstolearnEnglisheachday.Ittook

4、themhalfthenighttogethomeinthesnow.2)不定式作表语不定式作表语常表示将来的动作，主语常常是表示意向、打算、计划的词，如wish,idea,task,purpose,duty,job等。【例如】Themostimportantthingforone'shealthistohaveplentyofexercise.Mychiefpurposehasbeentopointoutthedifficultiesofthematter.Thepurposeoftheorganizationistogreetallnewcomerstothecityandtop

5、rovidethemwithanynecessaryinformation.WhatIwantedwastogettheworkdoneasquicklyaspossible.3)不定式作宾语不定式常在下列动词后面作宾语：afford,agree,apply,arrange,ask,attempt,beg,begin,care,choose,claim,consent,demand,decide,desire,determine,expect,fail,hope,hesitate,hate,intend,learn,like,manage,mean,neglect,offer,pla

6、n,preparepretend,promise,refuse,resolve,seek,tend,threaten,want等。【例如】Iliketogooutforwalksinthewarmsunshineinspring.Mymotherhatestomovefromplacetoplace,forshefeelstired.Idecidetoworkhardandgetdoctor'sdegree.Theroomisdesignedtobemystudy,butnowithastobeusedasabedroomforthechildren.Shefailedtofinis

7、htheassignmentintime,andshewasworriedaboutit.ThereisamanatthereceptiondeskwhoseemsveryangryandIthinkhemeans()trouble.(CET-41997,1)A)makingB)tomakeC)tohavemadeD)shavingsmademean后面一般加不定式，所以A和D可以排除。根据句意，他看起来非常生气，他想找麻烦，不定式的动作还没有实施，应用一