has been ing是什么时态

has been ing是现在完成进行时，表示过去动作一直持续到现在并有可能继续下去。was+现在分词过去进行时,过去某一具体时间发生的动作。

例如

The company has been investing in new plant and equipment.

这家公司一直在投资购置新机器和设备。

This year the company has been trying to penetrate new markets.

今年这家公司一直试图打入新市场。

Tom, you have been doing the task for a month, haven\'t you?

汤姆，这项工作你已做了一个月了，是吗?

I have been collecting stamps for two years

我已经集邮两年了

When he was doing underground work he was arrested because a renegade informed against him.

他正在做地下工作时, 曾因叛徒告密而被捕。