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Most of the people says I wish I could, I wish you would.

Can't we use I wish I can, I wish you will?

I'd like to know what the main difference between the usage of can/will and could/would is.

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marked as duplicate by tchrist, Nicole, Ellie Kesselman, 200_success, Drew Mar 3 '15 at 1:27

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

In this context, could and would are used to express an hypothetical scenario. Can and will in the contrary have a sense of immediacy and certainty, so it wouldn't fit.

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You say "I can fly" and "I wish I could fly". "I wish I can fly" is wrong.

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"Can" asks the possibility, as in "Can you help me?". "Would" asks the person addressed if they have the will, as in "Would you help me?"

So "would" or "will" is more polite, implying that the person addressed has a choice to act.

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protected by tchrist Mar 1 '15 at 18:37

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