To help me understand what you're trying to say, please clarify:
* What language are you trying to translate this into?
* What does the phrase mean in the context you're using it?
For example, are you trying to say:
* "You're going to sleep because you're going to school tomorrow"
* "You will go to sleep because you have school tomorrow"
* "You will go to sleep and you'll go to school tomorrow"
Once you provide more information, I can help you translate it correctly.