completed in two years and a half. 人们原本期待这项工程在两年半内 80.如mean
（1）We meant to have stayed there a week.
=We had meant to stay here a week. 我们原打算在那儿呆一个星期的。
81.如want
I wanted to have dropped her a line, but forgot to do so.
=I had wanted to drop her a line,but forgot to do so.
我原想写一封信给她，但忘记了。
注意：
think的过去完成时（had thought）用来表示“原以为”、“本来以为”之
意，实际上没有实现。但不用thought to have done并且后面跟从句 82. 如：
（1）I had thought the party would
be a great success.
我原以为这次晚会会获得成功。 （2）The doctor had thought the boy would be saved.
那位医生原以为那孩子会获救。
④．动词不定式作介词but的宾语 不定式可以作介词but（除了）的宾语，如果介词之前有动词do的某种形式，或在, can’t help but, can’t
choose but can’tbut (只好) 后面的不定式也要省略。 83.如：
(1)There is nothing we can do
but____patiently. 我们只能耐
心等待。
A. to wait B. wait C. waiting D. waited
(2)We could do nothing but____.
我们没有办法只好等。
A. wait B. to wait C. waiting D. to be waited
84.(1)You can't help but ____
moving when you hear this song.
当你听到这首歌的时候，你不由自主的开始移到。
A.to start B.start C.starting
85.(1)He can’t choose but_____.
A. stay on B.to stay on
86(1)I can’t but____ his terms(条件).
A. agree to B.to agree to 否则就要带to。如：
87(1)The teacher made no comments
but____ him to work hard. 老师除了叫他努力学习外，未做
任何评价。
A. to tell B. telling
(2)He had no choice but____ there
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