Is this right sentence? (by vs. until)

[juliana0403]

Hi,

Is this right sentence?

"You have to finish your homework until I get back. "

I would liketo know the use of "until" is right in this sentence.

Thank you. :-D

 

[Anglika]

No.

You must finish your homework before I get back
You have to finish your homework by the time I get back.

 

[juliana0403]

Thank you,always...^^

 

[susiedqq]

do you mean?

You have until I get back to finish your homework

cry: Every kid's parental threat)