Fat - fatter - the fattest, sad - sadder - the saddest,
clean - cleaner - the cleanest,
thin - thinner - the thinnest,
wet - wetter - the wettest,
dirty - dirtier - the dirtiest,
ugly - uglier - the ugliest,
messy - missier - the missiest,
busy - busier - the busiest,
dry - drier - the driest,
bad - worse - the worst,
good - better - the best,
little - less - the least,
many - more - the most,
much - more - the most.