Breakdown of Du må ikke forsove dig i morgen.
du
you
ikke
not
i morgen
tomorrow
måtte
to be allowed to / must
Questions & Answers about Du må ikke forsove dig i morgen.
Why does må ikke translate to "must not" here, rather than "may not"?
In Danish, må ikke expresses a strict prohibition, which maps directly to the English "must not". If you wanted to express a lack of obligation (like "don't have to"), you would use behøver ikke. While må on its own often means "may" or "am allowed to", adding ikke makes it a firm rule against doing something.
Why is the pronoun dig used after forsove?
The verb at forsove sig (to oversleep) is a reflexive verb in Danish. It requires a pronoun that reflects back to the subject. Because the subject here is du, the correct reflexive pronoun is dig. You cannot simply say du må ikke forsove without it sounding incomplete.
Does the prefix for- in forsove follow a pattern that is useful to learn?
Yes, when the prefix for- is paired with a reflexive verb, it frequently indicates doing something to a detrimental or excessive degree. Just as at forsove sig means to sleep too long and miss something, you will also see at forspise sig (to overeat) or at forløfte sig (to injure oneself by lifting too much).
Is it acceptable to write i morgen as a single word?
No, according to official Danish spelling rules, time expressions like i morgen, i dag, and i går must always be written as two separate words. Although you will frequently see native speakers mistakenly write them as a single word online, it remains grammatically incorrect.