Simonehad been doing是什么用法
的有关信息介绍如下：
had been doing是什么用法
had been doing是英语沫篇16种时态当中的一种，叫做过去完成进行时。
表达的是动作在过去某一时间之前开始并延续到过游召季去的这个时间,这一动作可能还在进行,也可能已经停止民截.。
举个例子：I had been looking for it for days before I found it.
这东西我找了好多天才找着的
表示反复的动作。
例句：You had been giving me everything.
