第一个是被动形式,已经被完成
第二个是主动形式,一直在做,可能停止,也可能继续做下去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 for 20 year. 而用了被动语态have been done，非常疑惑这个关键在于marrybe married with someone 表已婚marrying (with) someone 表正在结婚可以理解为marry是瞬间的不是一直在嫁如果因为marry是瞬间动词，是不是只要是瞬间动词，have been doing 都要变成have been done的形式？