had been doing 和 has been doing . 有什么不同.
发布网友
发布时间：2024-10-18 04:20
共1个回答
热心网友
时间：2024-10-22 08:08
had been doing从过去开始就一直再干,尽管持续发生,但是过去的事情了,跟现在没有关系
has been doing 现在还在干,一直持续下去
