How long are you going to stay here?
你要在这儿停留多久？
Only two days. I'm going to visit a relative.
只待两天，我要探亲。
How long are you going to stay here?
你要在这儿停留多久？
How long do you plan to stay here?
你打算在这里待多久？
I will stay in the States for about a month.
我将在美国停留1个月。