Big ,heavy, short ,famous ,dirty ,clean,bad ,important ,beautiful, large,practical,early ,pretty, bright ,fresh, comfortable ,thin, weak ,far поставить в степени сравнения

big-bigger-the biggest

heavy-heavier-the heaviest

short-shorter-the shortest

dirty-dirtier-the dirtiest

clean-cleaner-the cleanest

bad-worse-the worst

important-more important-the most important

beautiful-more beautiful-the most buautiful

large-larger-the largest

practical-more practical-the most practical

early-earlier-the earliest

pretty-prettier-the prettiest

bright-brighter-the brighest

fresh-more fresh-the most fresh

comfortable-more comfortable-the most comfortable

thin-thinner-the thinnest

weak-weaker-the weakest

far-farther-the farthest