have been to与have gone to有何用法区别?

have been to 是已经去过了的意思 比如：I've been to China 我去过中国了 have gone to 是已经去了,但是人还在那里没回来 Dad have gone to China on business 爸爸已经去中国出差了 have been in 是已经呆过一段时...