What is rule of past perfect tense?

Related questions

1. What is the rule of Past Perfect?
2. Had slept or have slept?
3. What are the 3 perfect tenses?
4. What is the past tense of sleep?
5. What is the difference between simple past and past perfect?
6. What is structure of past perfect tense?
7. Why we use past perfect continuous tense?
8. What is past perfect aspect?
9. What is a perfect past tense?
10. How do you use past tense in a sentence?

Tags

1. #about
2. #before
3. #completed
4. #front
5. #shocked
6. #tense
7. #grammarly
8. #called
9. #point
10. #actions
11. #tootles
12. #perfect
13. #graffitied
14. #pluperfect
15. #discover
16. #someone