• Unit 7A: Past Modals of Deduction
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  • I'm certain John forgot his wallet at home. -> John _______________. (must have)
    John must have forgotten his wallet at home.
  • It's possible Emma was watching TV when you called. → Emma ____________ (might have been).
    Emma might have been watching TV when you called.
  • There's no way they were at the party last night. → They ____________ (can't have).
    They can't have been at the party last night.
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