To sleep over is "passer la nuit" in French. Ex: les enfants passent la nuit chez Jack : the kids are sleeping over at Jack's place.
In French, you would say "Je dors beaucoup." This translates directly to "I sleep a lot." The verb "dormir" means "to sleep," and "beaucoup" means "a lot."
Are you going to sleep is est-ce que tu vas dormir ? in French.
You would say "j'ai bien dormi" in French to mean "I had a good sleep."
J'aime dormir.
dormez bien
J'aime dormir
tu as bien dormi?
Using the 'impératif', this is 'dors!' in French.
'nous aimons dormir'
j'essaie de dormir
'Etes-vous le sommeil'
un sommeil merveilleux