Объяснение:

В сравнительной степени окончание er.В превосходной степени окончание est

Ответ:

small-smaller-the smallest

big-bigger-the biggest

happy-happier-the happiest

quiet-quieter-the quietest

simple-simpler-the simplest

nice-nicer-the nicest

lazy-lazier-the laziest

heavy-heavier-the heaviest

easy-easier-the easiest

thin-thinner-the thinnest

slow-slower-the slowest

clever-cleverer-the cleverest

funny-funnier-the funniest