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    #1

    doubt that/whether (solved)

    1. I doubt that Tom has taken my watch.
    2. I doubt whether Tom has taken my watch.

    What's the difference in meaning between the above two sentences?

    https://public.wsu.edu/~brians/errors/doubt.html

    If you really doubt that something is true (suspect that it’s false), use “doubt that”: “I doubt that Fred has really lost 25 pounds.” If you want to express uncertainty, use “whether”: “I doubt whether we’ll see the comet if the clouds don’t clear soon.” “Doubt if” can be substituted for “doubt whether,” though it’s considered somewhat more casual, but don’t use it when you mean “doubt that.”
    Last edited by sitifan; 24-Jul-2015 at 14:25.
    I need native speakers' help.

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