there have been 的用法there be 是有什么什么.have been是完成时.求分析there have been
问题描述：
there have been 的用法
there be 是有什么什么.
have been是完成时.
求分析there have been
答
我个人觉得 不存在这个句型吧
答
there have been 是已经存在某个东西
比如 ：there is a river here, 这有一条河，
那么： there has been a river since 1993, 意思就是从1993年开始，这就有一条河了。
答
there be句型是倒装句,意思是"有",be的形式由be后第一个名词的单复数决定；
there have been,意思是"曾经有",是there be句型的现在完成时态形式,此时be后主语为复数名词,如果be后主语为单数名词,则应为there has been
如
There have been some encouraging signs over the past couple of months.
在过去的几个月里有一些令人鼓舞的迹象.
There has been a singer playing guitar at the bar for many months.
曾经有个歌手在酒吧里弹了几个月吉他.