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Modals for Deduction

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  • I’m certain that she is a doctor.
    She must be a doctor.
  • I'm sure they aren't at work today.
    They can't be at work today.
  • I'm sure this movie is not good.
    This movie can't be good.
  • Perhaps he works today.
    He may/could/might work today.
  • John will probably come to the party.
    John may/might/could come to the party.
  • Perhaps he is at home.
    He might/may/could be at home.
  • I'm sure she is at home today.
    She must be at home today.
  • I'm sure Jane isn't late today.
    Jane can't be late today.
  • I'm sure the cat is in the house somewhere.
    The cat must be in the house.
  • Emily is crying. She --------------- be sad.
    must
  • Perhaps he has a new car.
    He might/may/could have a new car.
  • Kate is speaking loud. She ------------- be angry.
    must
  • I'm sure that Susan is not the thief.
    Susan can't be the thief.
  • It is impossible that he is Spanish.
    He can't be Spanish.
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