"Nespi, když máš pracovat!"

Translation: Do not sleep when you are supposed to work!

[MiguelGS12]

Do not sleep when you have to work!

[VladaFu]

That is musíš. See also my answer to Julia.

[Axel591520]

I got an email from DL today:
Thank you for suggesting “Don't sleep when you have to work” as a translation for “Nespi, když máš pracovat!”. We now accept this translation!

[Matt580814]

"supposed to" is not in this sentence

[VladaFu]

máš + infinitive = you are supposed + infinitive

[Julia233680]

I guess, you should also accept this translation "Don't sleep when you must work"

[VladaFu]

must=have to=musíš