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在复合结构中的不定式
不定式的复合结构是指有些动词带宾语后再带上不定式，作宾语的补足语。前边已提到过，在这种结构中宾语是不定式的逻辑主语。
1、有很多这样的动词可以跟宾语及其(或)补足语不定式,如：advise, allow, ask, enable, beg, cause, drive, encourage, expect, forbid, force, hate, get , intend, invite, like, permit, persuade, pretend, remind, say, teach, tell, trust, urge, want, warn等表示“致使”等意义
26) The company manager may enable the men who tend the machines a large panorama(全景)of possibilites.
[A] to see[B] see[C] seeing[D] seen
27) Did you intend us the new method?
[A] to use [B] using [C] our having used [D] the using of
28) The teacher encouraged good compositions.
[A] us write[B] us writing[C] us to write[D] our wrting
2、在某些成语动词如 arrange for, call on, care for, count on, count upon, depend upon, long for, prepare for, prevail upon, rely on, vote for, wait for等后面，也可以跟宾语加不定式的复合结构
We are waiting for the bus to come./ They voted for Wang Gang to be the monitor. / Don't count on me to do that.
3、另外，表示感觉的动词 see, hear, feel, watch, notice, observe和have, let, make后的宾语可接不带to的不定式(help后不定式可带to也可不带to)
29) I often heard him that his family was well descended.
[A] said[B] say[C] to say[D] to be said
30) We must have a person them build the house.
[A] see[B] to see[C] will see[D] shall see
31) You would become irritated [A] if you watched [B] the correspondence to pile up [C] on your desk day by day [D] .
4、表示心理状态的动词像consider, declare, find, prove, think, know , believe, discover, feel(=think), imagine, judge, pretend, suppose, understand等词的宾语补足语不定式一般是to be(或动词的完成时态)
32) “You've been taking a lot of nice photographs.”Thanks. I'm considering a professional photographer.
[A] becoming[B] about become[C] to become[D] over becoming
而且，在consider, declare, find, prove, think等动词后的to be 是可以省去的。如：She considered me a scholar. / They found him gulty.
不定式作状语
注意作状语的动词不定式要与其逻辑主语在意义上和数上的一致。
1、表示目的
22) its plans to promote disarmaments,the party has decided to establish a campaign headquarters with Benjamin Seaman as its leader.
[A]Although[B]To carry out[C]Except that[D] Make
23) pure lead,the lead ore is mined,then smelted,and finally refined.
[A] Obtaining[B] Being obtained[C] To obtain[D] It is obtained
24) When they met,Leonardo and his enemy were fighting.
[A]killed each other[B]killing each other[C]to be killed each other
[D]to kill each other
表示原因
It's very kind of you to say so. / I am pretty pleased to hear the news that you are elected as the president of the club. / I'm sorry to interrupt you. / They are quite surprised to see the great changes taking place in the area.