tall-taller -the tallest
close-closer-the closest
far farther the farthest
big bigger the biggest
happy happier the happiest
bad worse the worst
good better the best
pretty pretier the prettiest
angry more angry the most angry
angrily more angrily the most angrily
short shorter the shortest
fast faster the fastest
intelligent more intelligent the most intelligent
curious more curious the most curious
boring more boring the most boring
terrible more terrible the most terrible
curly curlier the curliest
beautiful more beautiful the most beautiful
ugly uglier the ugliest
tiny tinier the tiniest
slow slower the slowest
slowly more slowly the most slowly
clean cleaner the cleanest
dirty dirtier the dirtiest
thin thiner the thinest
slender more slender the most slender