1、cheap——cheaper2、tall——taller3、short——shorter4、small——smaller5、old——older6、cold——colder7、cool——cooler8、new——newer9、long——longer10、strong——stronger11、warm——warmer12、fast——faster13、quiet——quieter14、dark——darker15、bright——brighter16、clean——cleaner17、young——younger18、weak——weaker19、thick——thicker20、quick——quicker1easyeasiereasiest2lazylazierlaziest3prettyprettierprettiest4naughtynaughtiernaughtiest5mealymealiermealiest6earlyearlierearliest7thirstythirstierthirstiest8Dull—duller—dullest9Loud-louder--loudest10Boring—moreboring—mostboring11Warm---warmer--warmest12Creative—morecreative—mostcreative16wet,wetter,wettest13Expensive—moreexpensive—mostexpensive17busy,busier,busiest14high,higher,highest15large,larger,largest18delicious,moredelicious,mostdelicious19heavy,heavier,heaviest20dry,drier,drie