Ответ:

1. higher, the highert

2.small, the smallest

3.large, larger

4.heavier,the heaviest

5.new, the newest

6.interesting, more interesting

7.more beautiful, the most beautiful

8.difficult,the most difficult

9.more creative, the most creative

10.careful,more careful

11.worse,worst

12.much,more

13.good,best

14.less,least