Big-bigger-biggest.
short-shorter- shortest.
clean- clearer- clearest.
beautiful- more beautiful- most beautiful.
large-larger- largest.
famouse-more famous- most famous.
good-better-best.
bad-worther-worth.
dirty-dirtier-dirtiest.
not не думаю что есть сравнительная степень у слова нет.
pretty- prettier- prettiest.
day день и тоже нет степени.
little-litter- littlest.
much-more-most.