What is perfect tense in English?

Related questions

1. What is perfect past tense with example?
2. Is called past tense?
3. What is the structure of present perfect tense?
4. Does present perfect tense?
5. What is the use of ago?
6. What is past tense and types?
7. When present perfect tense is used?
8. Is ago a preposition?
9. What are the forms and functions of present perfect tense?
10. How do we use present perfect tense?

Tags

1. #future
2. #three
3. #completed
4. #tense
5. #perfected
6. #appear
7. #condition
8. #verbs
9. #tenses
10. #participle
11. #action
12. #perfect
13. #indicate
14. #present