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大小:63.50 KB
页数:6页
时间:2019-02-03
《不定式用法及例句》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、不定式一、基本用法1.名词用法:(1)当主词:例:Toprotectenvironmentisimportant.·可用动名词(Ving)代替例:Sleepingeighthoursadayisgoodathealth.·可用假主词(it)代替:中文没有这种用法It’s+adj.(形容物)+for+toVadj.(形容人)+of+toV例:Itisimportanttoprotecttheenvironment.·表明不定词意义上的主词(对某人来说)时,在toV前加forsb.例:Itisimportantforallofustop
2、rotecttheenvironment.·不定词的否定形:not+toV例:Nottodependonothersisthebestwaytosuccess.(2)当补语:配beV例:Adoctor’sdutyistotakecareofsickpeople.(3)当受词:·配一般V例:Mysonneedstoseeadentist.·疑问词+toV:视为名词片语例:Theproblemiswheretosetupthetent.2.形容词用法:修饰名词(1)当补语配be动词例:Amywastheonlypersontoremem
3、bermybirthday.·【名词/代名词+toV+介系词】的形式中,名词/代名词为介系词的受词例:Ihaveparentstotakecareof.parents为of的受词Ihavetotakecareofmyparents.·修饰名词的不定式可用关系代名词替换例:I’mlookingforsomeonetohelpmewhowillhelpme.3.副词用法:修饰一般动词、副词、形容词(1)表示目的:为了…·可用inorderto/soasto代替例:toHewenttoGermanyinordertostudymusic.
4、soasto6(5)表示原因:跟在表感情后的形容词之后例:Iwasshockedtoseethescene.(6)表示结果:·only/never+toV有“失望”的意思例:Wewereseparatednevertoseeeachotheragain.(7)表示条件:修饰假设语气的主要子句例:Iwouldgiveyouanythingtogototheconcert.ifIcould二、其他用法1.表示动作很难或容易做,用hard/easy+toV表现例:Poetryishardtotranslate.easy2.[beV+adj
5、.+toV]的惯用表现(1)beVapttoV易于…的(2)beVreadytoV愿意…;易于…(3)beVwillingtoV乐意…(4)beVeagertoV渴望…(5)beVlikelytoV可能…(6)beVanxioustoV急着想要…3.enoughtoV够…可以…so…that+S.+(can)如此…以至于…例:Shewaskindenoughtooffermeherseat.Shewassokindthatsheofferedmeherseat.·enough当adj.时=sufficient/sufficientl
6、y例:Ihaveanenoughincometosupportyou.asufficient4.too…toV…太…而不能…so…that+S.+can’t如此…以至于不能…例:Thisbedistoosmallformetosleepin.ThisbedissosmallthatIcan’tsleepin.·onlytoo+(happy/glad/pleased…)+toV…非常…而…very+(happy/glad/pleased…)+toV例:Iamonlytoogladtohelpyou.very65.so…astoV…非常
7、…以至于…;到…的程度that+S.…例:Hewassoangryastobeunabletospeak.thathewas·so和such的区别so(ad.):修饰adj./ad.Such(adj.):修饰n.sucha/an+单数名词6.toV当受词补语的用法:S.+V.+O+toV(1)表示希望:like/want/wish/expect例:Iwantyoutotellmethetruth.(2)表示许可:allow/permit例:Pleaseallowmetointroducemywife,Rosaline.(3)表示思考
8、、认识等:think/believe/consider/find/recognize例:Webelievehimtobehonest.(4)表示依赖、建议、要求、命令等:tell/advise/order/ask/beg/reques
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