having been here since 2006.这里的"having been "

having been here since 2006.这里的"having been " to having been doing 和having been doing 的区别 Since having been here ,I have to accept it ,there being no being还是having been? Having been 是什么时态 having been done和having done的区别 being done having been done的区别 having been done 例句的疑问. Having been done ,done的区别 having been done和done的区别 Having been done ,done,having done 关于having been done 和 have been done的区别