其实过去进行时不是这样用的啊!
其实弄清楚过去进行时的结构,就很简单了!
过去进行时：have been doing sth.
但是,根据中文意思,我觉得应该用过去完成进行时才对.
过去进行时：have had been doing sth.
所以翻译为：Have had the effects of Interest Rate Policy been playing roles?