has been doing与had been doing

来源：百度知道 编辑：UC知道 时间：2024/05/25 10:28:05
has been doing与had been doing,这两个时态分别代表怎样的概念，表示怎样的动作发生，用于何种情况，请大家分别具体解释一下它们所用的场合

has been doing表示动作到现在为止一直在做
I have been waiting for you for an hour。
had been doing表示动作到过去某一时刻为止一直在做
I had been waiting for you for an hour until you finally reached。

“have been doing sth”的中文意思是“从过去到现在，动作一直在持续”。had been doing 则表示动作到过去某一时刻为止一直在做
可以把第二个理解为第一个的过去时