Make up 6 sentences (2 positive, 2 negative, 2 sentences) in Present Perfect Continuous.

sit
play
paint
use
run
cook

She has been sitting on the sofa.

They have been playing in the backyard for 2 hours.

He hasn't been painting since he was child.

She hasn't been using computer for 3 weeks.

How long has she been running?

How long have they been cooking dinner?