old, older, the oldest

short, shorter, the
shortest

fast, faster, the fastest

big, bigger, the biggest

long, longer, the longest

clean, cleaner, the
cleanest

high, higher, the highest

late, later, the latest

tall, taller, the tallest

low, lower, the lowest

pretty, prettier, the
prettiest

happy, happier, the
happiest

modern, more modern,
the most modern

expensive, more
expensive, the most
expensive

intelligent, more
intelligent, the most
intelligent

important, more
important, the most
important

beautiful, more beautiful,
the most beautiful

comfortable, more
comfortable, the most
comfortable

romantic, more romantic,
the most romantic

unusual, more unusual,
the most unusual

original, more original,
the most original

relaxing, more relaxing,
the most relaxing

good, better, the best

bad, worse, the worst

far, farther, the farthest

clever, cleverer, the
cleverest/ clever, more
clever, the most clever

friendly, friendlier, the
friendliest/ friendly, more
friendly, the most friendly

common, commoner, the
commonest

common,

more common, the most
common

cruel, crueller, the
cruellest

cruel, more

cruel, the most cruel

gentle, gentler, the
gentlest

gentle, more

gentle, the most gentle

pleasant, more pleasant,
the most pleasant

pleasant, pleasanter, the
pleasantest

polite, politer, the
politest

polite, more

polite, the most polite

shallow, shallower, the
shallowest

shallow,

more shallow, the most
shallow

simple, simpler, the
simplest

simple, more

simple, the most simple

stupid, stupider, the
stupidest

stupid, more

stupid, the most stupid

quiet, quieter, the
quietest

quiet, more

quiet, the most quiet