Answer:
1. small - smaller - the smallest
2. tall - taller - the tallest
3. shy - shyer - the shyest
4. hot - hotter - the hottest
5. long - longer - the longest
6. funny - funnier - the funniest
7. old - older - the oldest
8. short - shorter - the shortest
9. cold - colder - the coldest
10. nice - nicer - the nicest
11. good - better - the best
12. loud - louder - the loudest
13. clever - cleverer - the cleverest
14. pretty - prettier - the prettiest
15. happy - happier - the happiest