tall-taller-tallest
serious-more serious-most serious
ugly-uglier-ugliest
gloomy-gloomier-gloomiest
clever-cleverer-cleverest
polite-more polite-most polite
brave-braver-bravest
honest-more honest-most honest
great-greater-greatest
wise-wiser-wisest
thin-thiner-thinest
sad-sader-saddest
