What is the example of past perfect tense?

Related questions

1. How do you know if a verb is active or passive?
2. What is progressive passive?
3. Does Present Perfect Continuous Passive exist?
4. Why is the passive voice bad?
5. What is the rule of past continuous tense?
6. What is a past continuous tense?
7. Will be being passive?
8. What does present passive mean?
9. What is past continuous passive?
10. Which tense is not changed into passive voice?

Tags

1. #following
2. #tense
3. #example
4. #plane
5. #party
6. #examples
7. #airport
8. #perfect
9. #participle
10. #before
11. #sentences
12. #subject