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Thread: whether or if

  1. #1
    zahrah2010 is offline Newbie
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    Default whether or if

    when should I use whether ? and what are the cases where I should use if ?

    For example, if I say

    1-How do I know if he says the truth or not?
    2- How do I know whether he says the truth or not?

    which sentence is correct and why?
    thanks in advance

  2. #2
    Tdol is offline Editor, UsingEnglish.com
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    Default Re: whether or if

    Whether is common when we have a clear binary choice, especially when or not is used. Here, whether works better for me.

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