You must know Beijing well.

你一定非常熟悉北京。

A: How many times have you been to Beijing?

A: 你来北京多少次了？

B: Lots of times. Sometimes for business², sometimes for holiday.

B: 很多次了。有时来出差，有时来度假。

A: You must know Beijing well now.

A: 你现在对北京一定非常了解了。

B: Well, I get to know it better every time I visit.

B: 哦，我一次比一次更了解北京。

A: That's good. I think it's better when you know a city well.

A: 好。我想当你了解一个城市的时候感觉更好。

B: Yes. You enjoy it  more. It's more interesting.

B: 是的。你会更喜欢它。它会更有趣。

1. To ask someone⁴ how often they have done something, you can say: How many times...e¹.g. How many times have you been to Beijing? 要问某人做某事做了多少次，你可说：How many times..(多少次...)。例如：How many times have you been to Beijing? (你去过北京几次？)

2. If you want to describe⁵ how welll you know a place, such⁶ as³ a city, you can say: I get to know it better every time I vist. 如果你想描述你对某地非常熟悉，比如一个城市，你可以说：I get to know it better every time I visit (我一次比一次更了解它)。