Repeat the last letter
big
bigger
easy
easier
bad
worse
small
smaller
the smallest
beautiful
more beautiful
the most beautiful
hot
hotter than
the hottest
lazy
lazier than
the laziest
good
better
old
older than
the oldest
expensive
the most expensive
fat
fatter than
the fattest
crazy
crazier than
the craziest
bad
the worst
large
larger than
the largest
more dangerous
the most dangerous
happy
happier than
the happiest
good
the best
tall
taller than
the tallest
difficult
the most difficult
pretty
prettier than
the prettiest
cheap
cheaper than
the cheapest
interesting
the most interesting