Which sentence correctly uses a modal to express a past ...

★ Modal Probability

Which sentence correctly uses a modal to express a past impossibility?

A. She must have been there.

B. He might have been late.

C. They can’t have finished already.

D. You should have known.

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Which sentence correctly uses a modal to express a past probability?

A. She must be tired after the long journey.

B. He might have forgotten the meeting.

C. They can’t be at the office now.

D. You should finish your homework.