have been done 和 have been doing剑桥中级英语语法里面有一个单元，给了一个例句：They have been married for 20 years.用了have been done这个形式，为什么不是They have been marring for 20 years?或者They have married f

have been done 和 to be done being done,have been done和having done怎么分辨 HAVING BEEN DONE和HAVE BEEN DONE有什么区别? have done和have been done 的区别, have done和have been done的用法是什么? have done和have been done有什么分别 have been done和have been do的区别 having being done 和have been done 有什么区别 have been done和be done的区别 have been done和have been doing 和having been done和having done的区别.请举例, have been doing ,have done和have doing区别 有关have done 和be done的问题,什么时候用be done 什么时候用 have 以及have been done. can't have been和can' have done有什么区别或者must have been和must hane done;may have been和may have done have sb done和have been doing有么? have been to和have done to的区别 have been doing have done 的用法和区别 have been doing have done 的用法和区别 must have been done must have done