Good morning
I answered the same question before, please click on الاسئلة المنشورة on the left and then click on the question and see the answer.
anyway, the anser is:
The presenet perfect continuous talks about something started in the past, has continued without stop till the present and may continue in the future, while the present continuous talks about somthing happening at the time of speaking or a temporary action.
Thank you
Majed