air
tall
taller, the tallest
cheap
cheaper, the cheapest
small
smaller, the smallest
fast
faster, the fastest
smart
smarter, the smartest
short
shorter, the shortest
pretty
prettier, the prettiest
happy
happier, the happiest
high
higher, the highest
old
older, the oldest
cheap
cheaper, the cheapest
big
bigger, the biggest
beautiful
more beautiful, the most beautiful
important
more important, the most important
expensive
more expensive, the most expensive
diligent
more diligent, the most diligent
good
better, the best
bad
worse, the worst
expensive
more expensive, the most expensive
many
more, the most