How do we use present perfect progressive?

Related questions

1. Is the present perfect a present or past tense?
2. What are simple verbs?
3. What is the formula of Present Perfect?
4. What is the example of simple present tense?
5. What are examples of aspects?
6. How do you identify the present perfect tense?

Tags

1. #present
2. #weeks
3. #tuesday
4. #continuous
5. #continued
6. #duration
7. #something
8. #which
9. #durations
10. #minutes
11. #until
12. #since
13. #started
14. #perfect