1. nicer -> nicest

2. shorter -> shortest

3. younger -> youngest

4. newer -> newest

5. older -> oldest

6. more careful -> the most careful

7. more modern/ moderner -> the most modern

8. more popular -> the most popular

9. more dangerous -> the most dangerous

10. more expensive -> the most expensive

11. less -> the least

12. worse -> the worst

13. better -> the best

14. more -> the most

$@mocmoc756$

1. nice - nicer - nicest

2. short - shorter - shortest

3. young - younger - youngest

4. new - newer- newest

5. old - older - oldest

6. careful - more careful - the most careful

7. modern - more modern - the most modern

8. popular - more popular - the most popular

9. danerous- more dangerous - the most dangerous

10. expensive - more expensive - the most expensive

11. little - less- the least

12. bad - worse - the worst

13. good - better - the best

14. much/many- more - the most