clean- cleaner, cleanest
easy- easier, easiest
good- better, best
dirty- dirtier, dirtiest
fat- fatter, fattest
beautiful- more beautiful, most beautiful
sad- sadder, saddest
flat- flatter, flattest
active- more active, most active
comfortable- more comfortable, most comfortable
hot- hotter, hottest
happy- happier, happiest
wet- wetter, wettest
narrow- narrower, narrowest
big- bigger, biggest
busy- busier, busiest
noisy- noisier, noisiest
dirty- dirtier
thin- thinner
little- more little, most little
bad- badder, baddest
few- fewer, fewest
much- more, most
many- more, most
rich- richer, richest
