badly --worse--worst
carefully--more carefully--most carefuly
slowly--more slowly---most slowly
healthy--healthier---healthiest
hot--hotter--hottest
far--farther--farthest或 further--furthest
heavy--heavier--heavist
old--older--oldest
expensive--more expensive--most expensive
well-known--more well-known--most well-known
little--less--least
few--fewer--fewest
thin--thinner--thinnest
easily--more easily--most easily
often--more often--most often
large--larger--largest