sad
sadder, the saddest
young
younger, the youngest
cold
colder, the coldest
fat
fatter, the fattest
lazy
lazier, the laziest
Short
shorter, the shortest
Old
older, the oldest
hot
hotter, the hottest
Nice
Nicer, the nicest
fast
faster, the fastest
Dirty
dirtier, the dirtiest
angry
angrier, the angriest
large
larger, the largest
Loud
louder, the loudest
quiet
quiter, the quitest
slow
slower, the slowest
tall
taller, the tallest
Happy
happier, the happiest
long
longer, the longest
clean
cleaner, the cleanest