He can (could) have got on a bus. 他可能已上车了。
He can have understood what you had said.
他可能已经听懂你所说的了。
She know about it. You must have told her.
她知道这事了,你肯定已经告诉她了。
He must have arrived there. 他一定到那了。
You needn’t have told them that.
你本来不必告诉他们的。
You could have done it better. 你本来可以做得更好的。
She may (might) have gone to the doctor. 她或许是去看医生了。
We ought to have given you more help. 我们本应该给你们更多的帮助的。
2) 情态动词 + be doing, 表示“……正在”的意思,是对目前正在做的情况的推测。
can be doing
可能正在做
might be working
也许正在做
must be waiting
一定在等
should be watching
应该正在观看
may be playing
也许正在玩
10. 情态动词用法归类:
1)表示“能力”的情态动词:
can, could (be able to)
2) 表示“可能,也许”、“肯定”等推测判断的情态动词:
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