Tom didn’t answer the door, and all the lights were off., must have fallen asleep, couldn’t have fallen asleep, Sarah arrived exactly on time, even though traffic was terrible., couldn’t have taken the bus, might have taken the bus, The concert started at 8:00 p.m., and Mark arrived at 9:30 p.m., might have seen the beginning, couldn’t have seen the beginning, Jenny studied for hours every day before the exam and got 100%., must have studied hard, might not have studied hard, Nobody knows where Carlos is. His phone is off., might have gone out, must have gone out, The classroom is empty, and all the students’ bags are gone., may not have left, must have left, Emma usually remembers birthdays. She even set a reminder., might have forgotten, couldn’t have forgotten, The roads were flooded after the storm., couldn’t have rained heavily, must have rained heavily, The package hasn’t arrived yet., might have lost it, must have lost it, Alex never received my message because his phone battery died., must not have seen it, Could not have seen it.

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