there has been的用法

there has been的用法 there has/have been的用法 has been的用法has been的用法 He has been there (for)six months.这句话里 for 的用法 ,以及能不能省略. has been to的主要用法 Though learning gymnastic has been more difficult 这里的has been 是什么用法不是只有 have been dong 和has been done吗?这里的has been 是什么? it has been since.用法 has been 还有,解释一下has+been+过去分词的用法,是什么时态之类的. was made与has been made的区别及用法 have has had或 having +been 的区别和用法 There has been a misunderstanding. there has been...为什么要加been? have been to,has been to ,have been in ,与have gone to,has gone to 的区别和用法. 请问HAS BEEN和 HAVE BEEN HAD BEEN的用法以及分别加DONE后的用法请问HAD BEEN 单复数用法有区别吗 求has been for的具体用法和与has been to,has gone to, has been in, has been for的区别.加has been for等的例句十万火急！！！！！如解决，非常感谢！！ 被动语态的结构?have/has been 和 have/has gong 的用法和区别? 请问have/has gone to及have/has been away的意思,区别及用法 谁能帮我解释下has gone to 和has been to 的区别用法如上