The present perfect progressive/or also called continuous is the tense of detective work. When someone looks at you and asks, "Have you been painting?", the answer is either obviously, "yes" because you are covered in a color other than your skin color, or it is a genuine request for information to satisfy someone's curiosity. Perhaps you smell of paint. The present perfect progressive tense is a math problem (Tom is cooking.) + (He started cooking four hours ago.) = (Tom has been cooking for four hours or since some unit of time, ie. since this morning, or since 4pm).
Check out this website if you want to test your skills with the present perfect, also called continuous. http://www.perfect-english-grammar.com/present-perfect-continuous-exercise-1.html
or watch these examples of the present perfect continuous explained with song lyrics.
ANNABELLE B-BAUMANN, Communication Coach
"Annabelle I've learned alot from you .....with your friendly art and your diversified lessons... it is never boring!!!" -Doris, BASF
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