Present Perfect Continuous

has been skiing
we have been sitting
you have been
they have been

stopped or just

stopped; there is a connection with now
I am tired. I have been working in the garden.
Why are you so dirty? What have you been doing?

- for actions repeated over a period of time, when we
want to say how long
I´ve been playing tennis for 10 years.
He has been learning English since he was ten.

have you been sitting here?
3)How long have you been drinking

coke/tea?
4)How long have you been going to school?
5)Why are you tired? What have you been doing?
6)Why are your lips green? What have you been eating?