Big
bigger, the biggest
Small
smaller, the smallest
Young
younger, the youngest
Fat
fatter, the fattest
Thin
thinner, the thinnest
Clever
cleverer, the cleverest
Pretty
prettier, the prettiest
Good
better, the best
Bad
worse, the worst
Fast
faster, the fastest
Slow
slower, the slowest
Strong
stronger, the strongest
Heavy
heavier, the heaviest
