What is the structure of present indefinite tense?

Related questions

1. What is a progressive perfect verb?
2. What is perfect progressive aspect?
3. What does present perfect progressive mean?
4. What are Progressive perfect verbs?
5. What is progressive example?
6. Can we use ago with present perfect?
7. What is a progressive verb example?
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10. What is the formula for present perfect continuous tense?

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1. #verbs
2. #person
3. #singular
4. #kinds
5. #subject
6. #structures
7. #sentence
8. #number
9. #different
10. #structure
11. #other
12. #third
13. #present
14. #simple
15. #above