1. interesting --> more interesting --> the most interesting
2. big --> bigger --> the biggest
3. happy --> happier --> the happiest
4. small --> smaller --> the smallest
5. expensive --> more expensive --> the most expensive
6. thin --> thiner --> the thinest
7. short --> shorter --> the shortest
8. exciting --> more exciting --> the most exciting
9. fat --> fatter --> the fattest
10. fantastic --> more fantastic --> the most fantastic
11. colorful --> more fantastic --> the most fantastic
12. young --> younger --> the youngest
13. new --> newer --> the newest
14. delicious --> more delicious --> the most delicious
15. old --> older --> the oldest
