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  1. roseriver1012's Avatar
    • Member Info
      • Native Language:
      • Chinese
      • Home Country:
      • China
      • Current Location:
      • China

    • Join Date: Dec 2009
    • Posts: 273
    #1

    Question may have done or could have done?

    ---I can't find my keys anywhere. I saw them on the table this morning.
    ---I think you ________ them in your car.
    A. may have left B. could have left

    Which one is acceptable for the situation above? And what is the difference between the two? I always can't tell! Thanks for help.

  2. tzfujimino's Avatar
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      • Native Language:
      • Japanese
      • Home Country:
      • Japan
      • Current Location:
      • Japan

    • Join Date: Dec 2007
    • Posts: 2,695
    #2

    Re: may have done or could have done?

    Hello, roseriver1012.

    Both "may have + past participle" and "could have + past participle" are used to express the possibility in the past.
    For this reason, A and B are both acceptable, in my opinion.

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