Yet

[airfix]

Could someone tell me if this sentence is correct - "What have you finished yet ? " It sounds incorrect to me but if it is then why is it wrong ?
Thank you.

[philo2009]

Not a well-formed sentence. Basically, 'yet' is not used in open questions, but in closed (yes/no) questions, such as

Have you finished yet?

[Tdol]

How about using something so far instead?

[billmcd]

How about using something so far instead?

Or, "How much have you finished?"