1) Marcia seems very relaxed. a) She must have gotten fired. b) She may have just come back from vacation. c) She must not have seen them. 2) Claire is packing her things. a) She might not have studied very hard. b) She must not have seen them. c) She must have gotten fired 3) Jeff got a bad grade on his test. a) He might have worked late last night. b) He might couldn't have heard good news. c) He might not have studied very hard. 4) Rodrigo looks very tired today. a) He might have worked late last night. b) He might couldn't have heard good news. c) He might not have studied very hard. 5) Julia didn't talk to her friends in the cafeteria. a) She must have worked late last night. b) She must have not seen them. c) She must not have seen them. 6) Ahmed got a call and looked worried. a) He couldn't have heard good news. b) He might not have studied very hard. c) He might have worked late last night.

Past modals for degrees of certainty.

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