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  1. Unregistered
    Guest
    #1

    Must be or must have been?

    Who did it?

    It must be Nancy. / It must have been Nancy.


    Please tell me which a more proper, or both are alright?

    Thanks.

  2. bhaisahab's Avatar
    • Member Info
      • Native Language:
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      • England
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      • Ireland

    • Join Date: Apr 2008
    • Posts: 25,596
    #2

    Re: Must be or must have been?

    Quote Originally Posted by Unregistered View Post
    Who did it?

    It must be Nancy. / It must have been Nancy.


    Please tell me which a more proper, or both are alright?

    Thanks.
    'Who did it?' refers to a past action so 'It must have been Nancy' is the correct choice.

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