I have been playing the piano for ten years.
She has been studying the flora and fauna of Russia since 2013.
The boys have been playing football for 2 hours.
Jenny has been writing greeting cards since 2 o’clock p.m.
Susan has been doing her bedroom since morning.
We have been learning English for six years .
Mum has been cooking for two hours.
Dad has been watering the apple trees since 11 a.m.
My sister has been making a new dress since Tuesday.