Составить правила комнаты что-то похожее на "вы не должны входить без стука" именно с предлогами mustn't НЕ ДОЛЖЕН! 5 правил с
You must not enter into my room and climb in my things. You must not enter my room in dirty shoes. You must not to scream in my room. You must not ignore my rules in my room. You must not throw yours things in my room.