考博英语语法:非谓语动词常考的其它结构 E{_p&FF
(1)疑问词+不定式结构 '?v.O}
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: Q^DKKp
When to start has not been decided.何时动身尚未决定。(主语) CcLP/
I don’t know what to do.我不知道该怎么办。(宾语) ts{Tk5+
The difficulty was how to cross the river.困难在于如何过河。(表语) S3P;@Rm
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) 9H" u\t|?
(注)A.有时疑问词前可用介词,如: |TkMrj0
I have no idea of how to do it.我不知道如何做此事。 O6YYOmt3
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: -wW%+wH
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. ORA+>
(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)。 Zv
kO#j
When the streets are full of melting snow, you cannot help but getting your shoes wet. [L{q
(3)不带to的不定式 2Af1-z^^K
1)在表示生理感觉的动词后的不定式不带to。这类词有: ?r'rvu'/
feel 觉得 observe 注意到,看到 overhear听到 3(}W=oI
watch注视 listen to听 perceive察觉,感知 :&/'rMi<T
notice注意 see看见 look at看 hear听 (m|p|rL
On seeing the young child fell into the lake,Eric sprang to his feet,and went on the rescue. |/Ggsfmby
2)另一类是某些使役动词,如make, let,have等。如: ,&G