If I want to ask a question about the difference(s) between A and B, but not sure about there is only one difference or many, should I use "What is the difference between A and B" or "What are the differences between A and B"? I have searched on https://linggle.com/, both forms are frequently used.

Similar examples include "What reasons cause..." or "What reason causes...", and "Who want..." or "Who wants...".

  • 1
    It depends on whether you expect the differences to be countable or uncountable. And whether you want an enumeration or just an overall assessment.
    – Hot Licks
    Commented Jan 22, 2020 at 0:14

1 Answer 1

What are the differences between A and B?

Is typically used when the number of differences are unknown.

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