Why we use present perfect continuous tense?

Related questions

1. What is present perfect tense in English?
2. What's the difference between past perfect and present perfect?
3. What is the identity of present perfect tense?
4. What is present perfect tense and past perfect tense?
5. Is have been present perfect?
6. What is perfect participle?
7. What is present perfect and present perfect continuous?
8. What does present perfect mean?
9. When use the present perfect tense?
10. What is difference between present perfect and present perfect continuous?

Tags

1. #tense
2. #present
3. #started
4. #using
5. #perfect
6. #formed
7. #construction
8. #shows
9. #progressive
10. #something
11. #known
12. #continuous
13. #continuing
14. #participle