考博英语语法:非谓语动词常考的其它结构 n-L]YrDPK[
(1)疑问词+不定式结构 3ZT/>a>@
疑问词who,what,which,when,where和how后加不定式可构成一种特殊的不定式短语。它在句中可以用作主语、宾语、表语和双重宾语。如: D>!v_v6
When to start has not been decided.何时动身尚未决定。(主语) ;+
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I don’t know what to do.我不知道该怎么办。(宾语) s8/ozaeo
The difficulty was how to cross the river.困难在于如何过河。(表语) QySca(1tN
I can tell you where to get this book.我可以告诉你哪里可以买到此书。(双重宾语) n0
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(注)A.有时疑问词前可用介词,如: VO\S>kw
I have no idea of how to do it.我不知道如何做此事。 uL qpbn
B.动词know 后面不能直接跟不定式作宾语,只能跟疑问词(如:how, what)+不定式: * wQZ'
While still a young boy, Tom knew to play the piano well and as he grew older, he wrote operas, the most famous of which is Carmen. h|$zHm
(2)介词except和but作“只有…,只能…”讲时跟不定式结构(but与不带to的不定式连用)。 XACEt~y
When the streets are full of melting snow, you cannot help but getting your shoes wet. g,{Ei]$>I
(3)不带to的不定式 #lLn='4
1)在表示生理感觉的动词后的不定式不带to。这类词有: 7csl1|U
feel 觉得 observe 注意到,看到 overhear听到 oIu,rjb
watch注视 listen to听 perceive察觉,感知
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notice注意 see看见 look at看 hear听 SIyS.!k>
On seeing the young child fell into the lake,Eric sprang to his feet,and went on the rescue. PN)TX~}
2)另一类是某些使役动词,如make, let,have等。如: WZDokSR
Let him do it.让他做吧。 2#Q"@
I would have you know that I am ill.我想要你知道我病了。 &<[]X@ bY
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①上述感觉动词与使役动词转换为被动结构时.其后的不定式一般需带to,如: b;t}7.V'%
He was seen to come. ?8aWUg
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The boy was made to go to bed early. R4K eUn"
②在动词find与help之后,不定式可带to亦可不带to,如: nd*!`P
He was surprised to find the sheep (to) break fence at this season.他发现羊在此季节越出栅栏,感到惊讶。 R}K5'`[%ZY
3)在do nothing/anything/everything but(except)结构中。例如: PPIG?fK)
Last night I did nothing but watch TV.昨天晚上,我除了看电视别的什么也没有干。 ^ZViQ$a"h;
但是,如果谓语动词不是“do nothing,anything,everything”,那么but(except)所跟的不定式则仍须带。 "}y3@ M^
The doctor told him nothing but to stop smoking.医生除了让他戒烟,其它什么都没有说。 N
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There was nothing for them to do but to remain silent.除了保持沉默以外,他们没有别有别的办法。 @,f,tk=\S
(4)不定式与动名词的逻辑主语和分词独立结构 c# 4ZDjvm6
1)不定式的逻辑主语为:for +名词(或代词宾格)+ 不定式。例如: [.yx2@W
I found it impossible for him to do the job alone.我发现他—个人干这活是不可能的。 !h~#L"z
(注)在表示人物性格、特性等的形容词后面,常用of引出不定式的逻辑主语。例如: ]|\>O5eeu
It was wise of him to do that.他那样做是明智的。 My43\p
2)动名词的逻辑主语为;①人称代词的所有格+动名词;②名词’s+动名词。例如: dpOL1rrE
Tom insisted on my going with them.他坚持要我和他们一起去。 U Y?]\4Om
He dislikes his wife’s working late.他不喜欢他妻子工作得很晚。 j]]ziz,E
3)某些形容词,如:careless等不定式后可以加of来引导出其逻辑主语。这类词主要有:absurd, bold, brave, courageous, careful, careless, clever, wise, foolish, silly, stupid, good, nice, kind thoughtful, considerate, greedy, generous, honest, modest, polite, rude, cruel ,selfish, wicked, wrong等 '| Q*~Lh
It is very kind of you to help me.你帮助我太好了。 <`VJU2
间或也可用for + there to be表示(而且there后面的不定式只能是to be)。 J&0wl]w|O%
It’s a great pity for there to be much trouble in the company.太遗憾了公司里有这么多的麻烦。 '_yk_[/
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