问题: 请教并请解释三
14. I am sorry ______ written you a letter at the time.
A. to have not B. to not have C. not to have D. not having
16. He could do nothing but _______for the bus _________.
A. wait, to come B. wait; come C. waiting; coming D. waited; came
17 .It is a problem that doesn't need ________ right now.
A. to solve B. solving C. being solved D. to be solving
21. Robert is said to __________ abroad, but I don’t know what country he studied in.
A. to have studied B. to study B. to be studying D. to have been studying
23. when are they __________ in their plan?
A. hand B. handed C. to hand D. give
29. I stopped to listen, and my son seemed _________ himself _________ in the living room.
A. to enjoy, to shut B. to be enjoying, shutting
C. to be enjoying, shut D. to have enjoyed, having shut
解答:
14. I am sorry __C____ written you a letter at the time.
A. to have not B. to not have C. not to have D. not having
be sorry not to do sth:抱歉不做某事,不定式表原因.
16. He could do nothing but __A_____for the bus _________.
A. wait, to come B. wait; come C. waiting; coming D. waited; came
wait for ... to do sth.but是连词,后面的动词和do时态一致,所以用原形.
17 .It is a problem that doesn't need ____B____ right now.
A. to solve B. solving C. being solved D. to be solving
sth need doing,某物/事需要…
21. Robert is said to _____A_____ abroad, but I don’t know what country he studied in.
A. to have studied B. to study B. to be studying D. to have been studying
过去式,Robert已经不在国外学习了,完成时态。
23. When are they ____C______ in their plan?
A. hand B. handed C. to hand D. give
to hand作表语.
29. I stopped to listen, and my son seemed _____C____ himself _________ in the living room.
A. to enjoy, to shut B. to be enjoying, shutting
C. to be enjoying, shut D. to have enjoyed, having shut
seem to do后接enjoy的现在进行时.
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