There has been和 Therehave been

There has been和 Therehave been there be 和 there has/have been there has been...为什么要加been? he has been there _twice____. there has been的用法 She has been there ________already He has been there for__ He has been there for six months 和 My brother has never been there have been 和there has been是怎么用的 用现在完成时,there have been 和 there has been造句,各造5个 there has been a time和there had been a time有什么区别? has been 和 has gone