Present Perfect Simple and Present Perfect Continuous
We use the present perfect tense to talk about things where there is a connection between the past and the present.
He’s written 16 books.
He started writing books at some time in the past. So far, he has written 16 books. He may write more books.
As well as the present perfect simple, we can use the present perfect continuous tense to talk about events with a connection to the present.
Look at these 2 sentences:
I’ve been decorating the house this summer. The focus is on the action – decorating – and the action is unfinished.
I’ve painted the living room blue. The focus is on the finished result. The activity is finished but we can see the result now.
We use the present perfect continuous when the focus is on an activity that is unfinished.