1.常规bright―brighter―brightest（明亮的）broad―broader―broadest（广阔的）cheap―cheaper―cheapest（便宜的）clean―cleaner―cleanest（干净的）clever―cleverer―cleverest（聪明的）cold―colder―coldest（寒冷的）cool―cooler―coolest（凉的）dark―darker―darkest（黑暗的）dear―dearer―dearest（贵的）deep―deeper―deepest（深的）fast―faster―fastest（迅速的）few―fewer―fewest（少的）great―greater―greatest（伟大的）hard―harder―hardest（困难的，硬的）high―higher―highest（高的）kind―kinder―kindest（善良的）light―lighter―lightest（轻的）long―longer―longest（长的）loud―louder―loudest（响亮的）low―lower―lowest（低的）near―nearer―nearest（近的）new―newer―newest（新的）poor―poorer―poorest（穷的）quick―quicker―quickest（快的）quiet―quieter―quietest（安静的）rich―richer―richest（富裕的）short―shorter―shortest（短的）slow―slower―slowest（慢的）small―smaller―smallest（小的）smart―smarter―smartest（聪明的）soft―softer―softest（柔软的）strong―stronger―strongest（强壮的）sweet―sweeter―sweetest（甜的）tall-taller-tallest（高的）thick―thicker―thickest（厚的）warm―warmer―warmest（温暖的）weak―weaker―weakest（弱的）young―younger―youngest（年轻的）2.双写最后一个字母，再加上“er”“est”构成比较级、最高级：big―bigger―biggest（大的）sad―sadder―saddest（伤心的）fat―fatter―fattest（胖的）hot―hotter―hottest（热的）red―redder―reddest（红的）thin―thinner―thinnest（瘦的）wet―wetter―wettest（湿的）mad―madder―maddest（疯的）3.以不发音的字母e结尾的形容词，加上“r”“st”构成比较级、最高级：able―abler―ablest（能干的）ripe―riper―ripest（成熟的）brave―braver―bravest（勇敢的）rude―ruder―rudest（粗鲁的）close―closer―closest（接近的）safe―safer―safest（安全的）fine―finer―finest（好的，完美的）strange―stranger―strangest（奇怪的）large―larger―largest（巨大的）wide―wider―widest（宽广的）late―later―latest（迟的）nice―nicer―nicest（好的）wise―wiser―wisest（睿智的，聪明的）white―whiter―whitest（白的）4.以字母y结尾的形容词，把y改为i，再加上“er”“est”构成比较级、最高级：busy―busier―busiest（忙碌的）funny―funnier―funniest（好玩的）dirty―dirtier―dirtiest（脏的）happy―happier―happiest（开心的）dry―drier―driest（干燥的）healthy―healthier―healthiest（健康的）early―earlier―earliest（早的）heavy―heavier―heaviest（重的）easy―easier―easiest（容易的）hungry―hungrier―hungriest（饿的）friendly―friendlier―friendliest（友好的）lazy（―lazier―laziest懒惰的）lucky―luckier―luckiest（幸运的）naughty―naughtier―naughtiest（调皮的）noisy―noisier―noisiest（嘈杂的）pretty―pr