八年级英语Unit 6 动词不定式的用法 辅导湘教版.doc

动词不定式的用法
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,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.
Ittookthemhalfthenighttogethomeinthesnow.
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.
Thepurposeoftheorganizationistogreetallnewcomerstothecityandtoprovidethemwithanynecessaryinformation.
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,plan,preparepretend,promise,refuse,resolve,seek,tend,threaten,want等。
【例如】
Iliketogooutforwalksinthewarmsunshineinspring.
Mymotherhatestomovefromplacetoplace,forshefeelstired.Idecidetoworkhardandgetdoctor"sdegree.
Theroomisdesignedtobemystudy,butnowithastobeusedasabedroomforthechildren.
Shefailedtofinishtheassignmentintime,andshewasworriedaboutit.
ThereisamanatthereceptiondeskwhoseemsveryangryandIthinkhemeans()trouble.(CET-41997,1)
A)making
B)tomake
C)tohavemade
D)shavingsmade
mean后面一般