Fill in the gap with a verb from the sentence above.
Jeff started to play a video game two hours ago. He's still playing it.
→ He a video game for two hours.
It started raining an hour ago.
It has been raining for an hour.
It is still raining now.
The activity started in the past and it is still going on. We use the present perfect continuous to stress that the activity has been lasting for some time (some hours, days, years etc.).
Kate has been learning Spanish for three years. She started to learn it three years ago and she's still learning it.
Where are you? I've been waiting for you for half an hour! I started waiting half an hour ago and I'm still waiting.
We have you been working here for six months. We started working here six months ago and we're still working here.