It is a subtle topic that has been discussed much; I doubt there is a simple explanation available. One of the clearest distinctions is that an action in present perfect may or may not be continuing through the present moment, while the present perfect continuous must indeed be doing so. You can read some of our previous discussions here:
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Mister Micawber One of the clearest distinctions is that an action in present perfect may or may not be continuing through the present moment, while the present perfect continuous must indeed be doing so.I'm afraid I have to disagree with you there.
fivejedjonI have been cleaning out the attic.And in AmE, he hasn't finished.
fivejedjonIn I have cleaned out the attic, the cleaning out of the attic is explitely complete.Yes.
fivejedjon In I have been cleaning out the attic, the completion of the cleaning out is not explicitly stated, but is not necessarily not possible.I think it's weighted the other way in AmE, that is all. Of course, he co