"You must not forget to cook."
Translation:Jullie moeten niet vergeten te koken.
Without moet, niet comes after the verb e.g. vergeten niet uw bon. Why does the niet comes before verb with moet?
niet comes after the conjugated verb. Here, the conjugated verb is moeten and niet comes after it.
Normally if there are two verbs (main+auxiliary) the auxiliary verb is at normal place anf the main verb goes to end of sentence. Why vergeten not at the end of sentence in this case?