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Grammar
Past speculation and deduction

Instructions Complete the second sentence so it means the same as the first. Use must/might/couldn't have+ past participle.

  1. There's no way that Polly cheated on the test. She got a C!
    Polly
    on the test. She got a C!
  2. It's possible Mom left her wallet at the store.
    Mom
    her wallet at the store.
  3. There's no chance that Pablo won the competition. He can't sing!
    Pablo
    the competition. He can't sing!
  4. There's chance that our dog ran away.
    Our dog
    .
  5. I'm sure that Paul got the scholarship. He's so smart.
    Paul
    the scholarship. He's so smart.
  6. I'm not certain that Kevin was in detention. He usually behaves well.
    Kevin
    in detention. He usually behaves well.
  7. The lights aren't on. I'm sure they've gone out.
    They
    because the lights aren't on.
  8. I'm sure he didn't remember my birthday because he didn't send a card.
    He
    my birthday or he would haves sent a card.