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  1. azhu's Avatar
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    Question Should I use "could" or "should" in this sentence?

    I was practicing how to use "can, could, may, might, must, should..."

    This question confused me:"It hasn't arrived yet. The courier ___ be delayed in the traffic."

    I thought "could" and "should" were both fit in this sentence, but the answer was only "could"...Why was that? Aren't "could" and "should" expressing possibility?

  2. Calis's Avatar
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    Re: Should I use "could" or "should" in this sentence?

    "Should" wouldn't make sense in this case, as it is used to denote that something has a "weak" obligation to be in a certain state, or an expectation that this something is in a certain state.

    The above sentence with "should" would only make sense if the person talking was trying to delay the delivery of a package, but that is quite contrived.

    [Not a teacher]

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