Robin looks tired today. He ___________(sleep) well last night. (50% possible), must have slept, might not have slept, should not have slept, I don't know why he hasn't called me back. He ___________(forget) my number. (50% possible), wouldn't have forgotten, may have forgot, might have forgotten, Our son promised to clean his room, but it is still very messy. He ___________(clean) it. (impossible), might not have cleaned, must have cleaned, can't have cleaned, The twins have guilty expressions on their faces. They ___________(do) something naughty. (100% sure), must have done, might have did, couldn't have done, My friend promised to pick me up at 7:00. It's now 7:25 and I don't see him. He___________(forget). (100% sure), can't have forgotten., must have forgotten., might have forgot., Oh no! Our car isn't in the driveway! Somebody ___________(steal) it. (100% sure), must have stolen, might have stole, must be stealing, My white shirt now has green streaks in it. It ___________(wash) properly. (100% sure), might not have washed, can't have washed, must not have been washed, My plants are dead. I ___________(water) them more often. (50% possible), can't have watered, must have watered, might have watered, Betty said she was really hungry, but she barely ate. She ___________(like) the food much. (impossible), can't have liked, might not have liked, must have liked, Someone was calling me on the phone. It ___________(be) my brother. He promised to call. (100% sure), must have been, might have been, can have been, There were some really difficult questions. I'm not sure. I ___________(pass) the exam. (50% possible), might not have passed, can't have passed, must not have passed, I'd better call Anne. She ___________ (read) my e-mail. (50% possible), can't have read, might not have read, must have read

Past Modals of Certainty

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