HOW LONG has Sarah been babysitting ?
She has been babysitting for 3 years.
She has been playing the guitar since she was 15 years old.
Present perfect BE + ING
Forme affirmative Forme négative Forme interrogative I/we/they/you
HAVE BEEN PLAYING
I/we/they/you
HAVEN’T BEEN PLAYING
I
HAVE we BEEN PLAYING ? you
they He/she/it
HAS BEEN PLAYING
He/she/it
HASN’T BEEN PLAYING
he
HAS she BEEN PLAYING ? it