Translation:If you don't fall asleep tonight, you will be tired tomorrow.
I understand the given solution is the correct one, but I tried using: "If you don't go to sleep", thinking that you can't voluntarily fall asleep, only put yourself in the condition to sleep, so it does not seem right (in English) to advise someone to fall asleep. Is "go to sleep" not a possible translation of "QongchoH" at all?
(edit) I have found just after this
yIQongchoH to be translated as "go to sleep!" So maybe this should be accepted too.
Also I don't seem to manage to get this right, even knowing the answer...
I tried If tonight you don't fall asleep, you will be tired tomorrow and this too was rejected. Well, I'll get more exercise out of this...