clean-cleaner-cleanest 　　early-earlier-earliest 　　great-greater-greartest 　　happy-happier-happiest 　　late=later-latest 　　hot-hotter-hottest 　　big-bigger-biggest 　　many-more-most 　　bad-worse-worst 　　little-less-least 　　pretty-morepretty-mostpretty 　　young-younger-youngest 　　cool-cooler-coolest 　　small-smaller-smallest 　　old-older/elder-oldest/eldest 　　easy-easier-easiest 　　good-better-best 　　sweet-sweeter-sweetest 　　short-shorter-shortest 　　warm-warmer-warmest 　　clever-cleverer/moreclever-cleverest-mostclever 　　well-better-best 　　fat-fatter-fattest 　　long-longer-longest