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2. 在have, set, keep, leave, get 等动词后作宾补 doing 表示进行的状态或持续的状态 done 表示被动关系
I’m sorry to have kept you waiting. You shouldn’t keep your lights burning in the day.
(3) ---Will you go home tomorrow?
---No. I 'm going to a lecture,or at least I am planning to.
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注意:如若不定式结构中是be或have, 需保留be 和 have (3) --- Are you a taxi driver? --- No, I used to be. (4) --- Hasn’t he finished writing the report? --- No, but he ought to have.
Can’t choose but do (只好)
Can’t help but do Can’t but do
I cannot but agree to his terms. We could do nothing but / other than wait. I cannot choose but ________ (laugh) We had no choice but __________ (wait)
2. She is not the person ____t_o__b_la_.me
3. I asked her if she had any rooms to let.
某些动词的不定式做表语时,其主动形式表达被动含义。