결과보다는 행위 그 자체에 초점을 맞춘다.

Is it raining?
No, but the ground is wet.
It has been raining.
비가 왔었다. (지금은 비가 오고 오지않고를 떠나서 비가 내렸다는거에 초점을 둔다.)

We use the present perfect continuous for an activity that has recently stopped or
just stopped. There is a connection with now:
- You're out of breath. Have you been running?
  (숨차다는 지금의 결과보다는 달렸다는 행위에 초점을 둔다.)
- Jason is very tired. He's been working very hard.
  (피곤하다는 결과보다는 열심히 일했다는 행위에 초점을 둔다.)
- Why are your clothes so dirty? What have you been doing?
  (옷이 더럽다는 결과보다는 무엇을 했는지에 대한 행위에 초점을 둔다.)
 
It is raining now. It began raining tow hours ago.
How long has it been raining?
It has been raining for two hours.
We often use the present perfect continuous in this way,
especially with how long, for, and since. The activity is still happening
or has just stopped.
- How long have you been studying English?
- Tim is still watching TV. He's been watching TV all day.
- Where have you been? I've been looking for you for the last half hour.

You can use the present perfect continuous for actions that are repeated over
a period of time:
- Debbie is a very good tennis player. She's been playing since she was eight.
- Every morning they meet in the same cafe. They've been going there for years.



<excerpts from Grammar in Use Intermediate>
Posted by 윤연식
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