has gone to和has been to的区别详解：
have/has gone to：去了某地（不在谈话现场） 
have/has been to：去过某地（曾经去） 
have/has been in：在某地 (现在所待的地方) 

Sam has gone to the supermarket.
 山姆去超市了。（不在说话现场） 
I haven't seen Tony for a few days. He has gone to Shanghai.
我好几天没见到唐尼了。他去上海了。


I have been to Beijing twice.
我去过北京两次。（曾经去过北京）
She has been to the museum many times.
她去过这家博物馆很多次了。

I have been in Guangzhou for years.
我已经在广州数年了。（现在在广州）
Mr Green has been in the city for 10 years.
格林先生已经在这个城市10年了。