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Which of the following sentences is correct?

1. Is it possible for you to do that? If no, I'll ask my friend.

2. Is it possible for you to do that? If not, I'll ask my friend.

Are there other possible ways of phrasing that?

Thank you.
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2. Is it possible for you to do that? If not, I'll ask my friend. This is the best choice.

1. Is it possible for you to do that? If your answer is no, I'll ask my friend. This is another choice.
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No. 2 is okay. Of course you can say Can you do that?

CB
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Comments  
golrazWhich of the following sentences is correct?
The correct one is "if not". "If no" is wrong. The opposite is "if so" (not "if yes").
golrazAre there other possible ways of phrasing that?
Well, you can write that sentence in hundreds of different ways. I don't really understand your question... What are you referring to, exactly?
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