clean - cleaner - the cleanest
handsome - more handsome - the most handsome
bad - worse - the worst
red - redder - the reddest
messy - messier - the messiest
wonderful - more wonderful - the most wonderful
young - younger - the youngest
well - better - the best
little - less - the least
easy-going - more easy-going - the most easy-going
dark - darker - the darkest
thin - thinner - the thinnest
impatient - more impatient - the most impatient
humorous - more humorous - the most humorous