4不定式.docx
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4不定式.docx
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4不定式
不定式
不定式作主语时经常用形式主语it.
例:
Itisn’trighttogossipaboutothers.
2动词不定式作宾语
有一些动词后必须接不定式作宾语。
这些动词有:
aim,agree,afford,arrange,decide,decline,attempt,care,choose,claim,determine,expect,fail,hope,intend,manage,pretend,refuse.
3.动词不定式作宾语补足语
V.+sbtodo这样的V有:
advise,allow,ask,cause,convince,enable,encourage,expect,force,invite,promise,remind,request,tell,want,warn等
例:
MayIrequestyoutoattendtheceremony?
练习:
1.Oureducationpolicyistoenableeverystudent______morally,intellectuallyandphysically.
A.developB.todevelop
C.developingD.developed
2.Coolingacopperbarwillcauseit________.
A.contractB.contracting
C.contractsD.tocontract
注:
以下动词后接不定式做宾语补足语,
省略小品词to.(感官动词:
see,watch,notice,observe,hear,listento,feel使役动词:
have,let,make)
例:
Weshouldmakethepastservethepresent.
练习:
1.Heatmakesgases________.
A.expandB.expanding
C.toexpandD.beexpanded
1.ProfessorBlackhadusall_____ournamesonapieceofpaper.
A.bewritingB.towrite
C.writtenD.write
2.“MayItakeamessage?
”
“Yes,pleasehavehim_______mewhenhegetsbacktotheoffice.”
A.tocallB.called
C.callD.calling
注意:
helpsb(to)dosth
动词不定式作定语
常用不定式作定语的名词有:
ability,attempt,decision,failure,hope,refusal,way
例:
1.He’sfamousforhisabilitytospeakfourlanguages.
练习:
1.Thedecision_______themotorswillcomefromthecontrolroom.
A.tostopB.tobestopped
C.stoppedD.stops
2.Thebestway______thisprincipleistoseehowitworksinpractice.
A.understanding
B.tounderstand
C.beingunderstood
D.tohaveunderstood
作定语的不定式若是不及物动词,它后面则应有相应的介词。
例:
1.Ineedapentowritewith.
2.Heisaverynicepersontoworkwith.
3.Thereisnothingtoworryabout.
练习:
1.Hewantstohavesometools_____.
A.toworkwithB.towork
C.toworkforD.working
当thefirst,thesecond,thelast等序数词在名词前,要求不定式作后置定语。
例:
Heisthefirstmantoarriveandthelastonetoleave.
练习:
1.IknewIwasn’tthefirst______.
A.arrivingB.arrive
C.toarriveD.tohavearrived
6.动词不定式作状语
inordertodo;soastodo;inordernottodo;soasnottodo;so…asto…;such…asto…;…enoughto…;too…to….
练习:
1.Mr.Smithadvisesustowithdraw___.
A).sothattogetnotinvolved
B).soasgetnotinvolved
C).soasnottogetinvolved
D).sothatnottogetinvolve
2.Thisistoosoft______forknives.
A.beingusedB.used
C.tobeusedD.tohavebeenused
3.Despitehisbrokenleg,Billcanwalk_______around.
A.goodenoughtoget
B.wellenoughgetting
C.wellenoughtoget
D.wellenoughtogetting
下面词语后接不定式:
besaid,bereported,beknown,seem,happen,appear,turnout
例:
1.Heissaidtobeabraveman.
2.Heappearstohavecaughtacold.
练习:
1.Theyarereported_______anotherironoreinthisarea.
A.discoveringB.discovered
C.tohavebeendiscovered
D.tohavediscovered
2.Theyappear_____thefilm.
A.enjoyedB.havingenjoyed
C.toenjoyD.tohavebeenenjoyed
注:
had/’dbetter(not)dosth;
donothing/anything/everythingbutdosth;
It’snice/kind/carelessofsbtodosth.
Whynotdosth?
练习:
1.Youhadbetter_______aforeignlanguage.
A.tomasterB.mastering
C.masteredD.master
练习:
1.Theyfoundthelecturehard______.
A.tobeunderstood
B.tounderstand
C.forunderstanding
D.tohavebeenunderstood
2.“I’dliketobuyadigitalcamera.”
“Well,wehaveseveralmodels_______.”
A.tochoosefromB.ofchoice
C.tobechosenD.forchoosing
3.Doctorssaydrinkingwaterwillhelpthepain______afterthebodyhastherightamountsofwaterandsalt.
A.disappearB.disappearing’
C.disappearedD.disappears
4.He’slookingforaplace________.
A.toliveB.tobeliving
C.tohavelivedD.tolivein
5.Haven’tyouanything_______?
A.toopenthebottlewith
B.tobeopenedthebottle
C.opensthebottlewith
D.tobeopeningthebottle
6.Youhadbetter_______theteacheraboutthis.
A.notaskB.nottoask
C.notaskedD.notasking
7.“Ithoughtyouhadplannedtopracticethepianotoday.”
“Ididnothingbut______lettersallday.”
A.wroteB.writingC.towriteD.write
8.Whynot______Billtoanswerthisquestion?
A.askedB.asking
C.askD.asks
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