记住不要没敲门就进别人的房间用英文怎样讲

Do remember not go into other's room without knocking on the door

remember that don't come into one's room without knocking

Remember : don't enter into other's room before you knock the door.

外国人用这种教训的口气比较少，建议和提醒比较多

Remember not to enter someone's room before knocking