What has this girl been doing?
She's been studying all night.
What have these people been doing?
They've been painting their house.
What have these people been doing?
They've been having heavy lunch/dinner.
What has this man been doing?
He's been running.
What has this woman been doing?
She's been shopping/ doing the shopping.
What have these people been doing?
They've been playing in mud.
What has this man been doing?
He's been playing tennis.
What have these people been doing?
They've been fighting/arguing.
What has this girl been doing?
She's been crying.