What are perfect tenses in English?

Related questions

1. What is the difference between present perfect and present perfect continuous?
2. What are some examples of present perfect tense?
3. What are present perfect tense examples?
4. What's the difference between past perfect and past perfect continuous?
5. What is the present perfect tense of teach?
6. What is the past perfect continuous?
7. Is Present Perfect a past tense?
8. When use the present perfect continuous?
9. How do you use past perfect continuous?
10. What is rule of present perfect continuous tense?

Tags

1. #present
2. #tenses
3. #formed
4. #tense
5. #complete
6. #action
7. #participle
8. #three
9. #which
10. #appropriate
11. #perfect
12. #english
13. #completed
14. #already
15. #means
16. #completely
17. #literally