Where do we use past simple and past perfect?

Related questions

1. Why is the perfect tense called perfect?
2. What is present perfect and present perfect continuous?
3. Is Present Perfect Continuous the same as present perfect progressive?
4. What is perfect participle?
5. What is the present perfect tense examples?
6. What is present perfect tense and past perfect tense?
7. Where do we use present perfect tense?
8. What is present perfect aspect?
9. Why we use present perfect continuous tense?
10. When we use present perfect continuous tense?

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1. #action
2. #these
3. #however
4. #about
5. #already
6. #simple
7. #dinner
8. #example
9. #before
10. #usually
11. #something
12. #happened
13. #which
14. #perfect
15. #another
16. #tenses
17. #eaten
18. #expressed
19. #things
20. #called