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    • Join Date: Nov 2007
    • Posts: 7
    #1

    must have been / had to be

    Hello there. I need your help.
    I'd be grateful if you could answer the question below.


    (a) The fire spread very quickly. It must have been arson.

    Which of the below is correct as an equivalent of (a)? I suppose (b) is.

    (b) The fire spread very quickly. It had to be arson.
    (c) The fire spread very quickly. It had to have been arson.
    (d) The fire spread very quickly. It has to have been arson.

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    • Join Date: Apr 2007
    • Posts: 4,146
    #2

    Re: must have been / had to be

    Quote Originally Posted by sakura-saku View Post
    Hello there. I need your help.
    I'd be grateful if you could answer the question below.


    (a) The fire spread very quickly. It must have been arson.

    Which of the below is correct as an equivalent of (a)? I suppose (b) is.

    (b) The fire spread very quickly. It had to be arson.
    (c) The fire spread very quickly. It had to have been arson.
    (d) The fire spread very quickly. It has to have been arson.
    (b) is the only one I would use, but you can also say 'It has to be arson.'
    (c) and (d) are unnecessarily complicated.


    • Join Date: Nov 2007
    • Posts: 7
    #3

    Re: must have been / had to be

    Quote Originally Posted by 2006 View Post
    (b) is the only one I would use, but you can also say 'It has to be arson.'
    (c) and (d) are unnecessarily complicated.

    Thank you!

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