Study

modals for certainty and possibility

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  • You´d better book, otherwise you _____be sure to get a seat.
    can´t
  • She ______ have calmed down before starting the talk, because her delivery was perfect.
    must
  • He would never have said that to you. You ____have heard him properly.
    can´t
  • You must / might / may be tired - you haven´t been to bed for two days!
    must
  • She _____ know about the complaint. She´s promoted him to team leader.
    can´t
  • He´s just been successful in getting a place on a postgraduate course, so he might / could / must be very academic.
    must
  • He ____ have lost his wallet - I saw him holding it at the supermarket checkout.
    can´t
  • He´s not answering. He ______ be in class.
    could
  • They _____ challenge you over this topic, you never know.
    could
  • Come inside and get warm. You ____ be freezing out there!
    must
  • I was amazed by her performance. She couldn´t / can´t / mustn´t have spoken more convincingly in the debate.
    couldn´t
  • It can´t / mustn´t / might be John over there, he´s already moved to Canada.
    can´t
  • It ____ be far now,. We´ve been driving for hours.
    can´t
  • You ______ be hungry, you just had dinner.
    can´t / couldn´t
  • He can´t / mustn´t / didn´t have been to Moscow, because he doesn´t have a Russian visa in his passport.
    can´t
  • She must / will / may have revised very well, because her exam results were outstanding.
    must
  • He´s won four Olympic gold medals, so he _________ be highly talented.
    must
  • It ____ be easy for him, looking after three kids on his own.
    can´t
  • This _____ be her house. I can see her car in the garage.
    must
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