word order

[shaci]

I wonder if you could tell me whether this is correct:
What would have you done if...?
I would say: What would you have done if...?
If yes, is there a difference between the two versions? What?

Thank you

[Donbelid]

What would you have done if... is correct.

The other sentence is incorrect.

[mykwyner]

"What would have you done..." is idiomatically correct if you use the contraction. "What would've you done if..."