1) My
2)you
3)the best
4)younger
5)hotter
6)best
7)good-better-the best
clean-cleaner-the cleanest
strong-stronger-the strongest
young-younger-the youngest
fast-faster-the fastest
happy-happier-the happiest
beautiful-more beautiful-the most beautiful
expensive-more expensive-the most ezpensive
8)are
9)is