have been in 表示现在还在某地.
My son has been in America for about 5 years.
have been to 表示曾经去过某地,现在已经回来了.
My son has been to America ,and now he is working at a Chinese-American company.
have been in 表示现在还在某地.
My son has been in America for about 5 years.
have been to 表示曾经去过某地,现在已经回来了.
My son has been to America ,and now he is working at a Chinese-American company.