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Past Modals

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  • Heather possibly hasn't left yet.
    Heather might not have left yet.
  • I’m sure that Liz hasn’t met Harry before.
    Liz can't have met Harry before.
  • Perhaps Pam and Tim decided not to come.
    Pam and Tim might have decided not to come.
  • I'm certain I left my umbrella at home.
    I must have left my umbrella at home.
  • I’m sure they haven’t eaten all the food. It’s not possible!
    They can't have eaten all the food.
  • Jack is supposed to have arrived half an hour ago. But he was late!
    Jack should have arrived half an hour ago.