Verified answer

Утвердительные:

I've been going through depression

He has been planning that trip recently

They have been playing football for an hour

отрицательные:

I haven't seen him for a month

They haven't been there since childhood

He said, he have been watched all day

вопросительные:

What have you been doing since I left?

Why has the phone been ringing for the last two hours?

How long has he been waiting?