Tall-taller-the tallest, comfortable-more comfortable - the most comfortable, cold-colder-the coldest, fashionable-more fashionable - the most fashionable, bad-worse-the worst, happy-happier-the happiest,nice-nicer-the nicest, popular-more popular-the most popular, little-less - the least, short-shorter-the shortest, active-more active - the most active.