1. I know an interesting story.
2. He knows a more interesting story.
3. She knows the most interesting story.
4. This is a longer path.
5. This is the longest path.
6. Her work is very important.
7. His work is more important.
8. My work is the most important.
9. This is a bad song.
10. This is a worse song.
11. This is the worst song.
12. He is a good engineer.
13. He is a better engineer.
14. He is the best engineer.
15. He brought a beautiful flower.
16. He brought a more beautiful flower.
17. He brought the most beautiful flower.
18. He told us about a happy man.
19. He told us about a happier man.
20. He told us about the happiest man.