现在完成进行时

主词	has/have been	动词原型 + ing
She	has been	swimming

肯定句：She has been / She's been running.
否定句：She hasn't been running.
疑问句：Has she been running?
否定型疑问句：Hasn't she been running?

现在完成进行时的作用

现在完成进行时涉及以前到现在一段不明确的时间，谈的是某件已经发生的事，但也许还没有结束，强调的是动作的过程和产生的结果，而且这个过程可能还会持续着，或者可能才刚结束。

始于过去且当下仍在持续的动作

She has been waiting for you all day (= 而且她现在还在等待).
I've been working on this report since eight o'clock this morning (= 而且我还没做完).
They have been travelling since last October (= 而且他们还没回家).

刚结束的动作，但说话者要强调的是这个动作产生的结果，或对现在造成的影响

She has been cooking since last night (= 而且桌上的食物看起来很美味).
It's been raining (= 街道上还是湿的).
Someone's been eating my chips (= 半包没了).

不用在进行时的动词

对于不用在进行时的动词，就使用现在完成时。例如：I've wanted to visit China for years.
She's known Robert since she was a child.
I've hated that music since I first heard it.
I've heard a lot about you recently.
We've understood everything.
we've heard this morning.