1. 在形容词词尾加上 “er” “est” 构成比较级、最高级： bright（明亮的）—brighter—brightest broad（广阔的）—broader—broadest cheap（便宜的）—cheaper—cheapest clean（干净的）—cleaner—cleanest clever（聪明的）—cleverer—cleverest cold（寒冷的）—colder—coldest cool（凉的）—cooler—coolest dark（黑暗的）—darker—darkest dear（贵的）—dearer—dearest deep（深的）—deeper—deepest fast（迅速的）—faster—fastest few（少的）—fewer—fewest great（伟大的）—greater—greatest hard（困难的，硬的）—harder—hardest high（高的）—higher—highest kind（善良的）—kinder—kindest light（轻的）—lighter—lightest long（长的）—longer—longest loud（响亮的）—louder—loudest low（低的）—lower—lowest near（近的）—nearer—nearest new（新的）—newer—newest poor（穷的）—poorer—poorest quick（快的）—quicker—quickest quiet（安静的）—quieter—quietest rich（富裕的）—richer—richest short（短的）—shorter—shortest slow（慢的）—slower—slowest small（小的）—smaller—smallest smart（聪明的）—smarter—smartest soft（柔软的）—softer—softest strong（强壮的）—stronger—strongest sweet（甜的）—sweeter—sweetest tall（高的）-taller-tallest thick（厚的）—thicker—thickest warm（温暖的）—warmer—warmest weak（弱的）—weaker—weakest young（年轻的）—younger—youngest 2.双写最后一个字母，再加上 “er” “est” 构成比较级、最高级： big（大的）—bigger—biggest fat（胖的）—fatter—fattest hot（热的）—hotter—hottest red（红的）—redder—reddest sad（伤心的）—sadder—saddest thin（瘦的）—thinner—thinnest wet（湿的）—wetter—wettest mad（疯的）—madder—maddest 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（能干的）—abler—ablest brave（勇敢的）—braver—bravest close（接近的）—closer—closest fine（好的，完美的）—finer—finest large（巨大的）—larger—largest late（迟的）—later—latest nice（好的）—nicer—nicest ripe（成熟的）—riper—ripest rude（粗鲁的）—ruder—rudest safe（安全的）—safer—safest strange（奇怪的）—stranger—strangest wide（宽广的）—wider—widest wise（睿智的，聪明的）—wiser—wisest white（白的）—whiter—whitest 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（忙碌的）—busier—busiest dirty（脏的）—dirtier—dirtiest dry（干燥的）—drier—driest early（早的）—earlier—earliest easy（容易的）—easier—easiest friendly（友好的） —friendlier—friendliest funny（好玩的）—funnier—funniest happy（开心的）—happier—happiest healthy（健康的）—healthier—healthiest heavy（重的）—heavier—heaviest hungry（饿的）—hungrier—hungriest lazy（懒惰的）—lazier—laziest lucky（幸运的）—luckier—luckiest naughty（调皮的） —naughtier—naughtiest noisy（嘈杂的）—noisier—noisiest pretty（美丽的）—prettier—prettiest silly（傻的）—sillier—silliest spicy（辣的）—spicier—spiciest thirsty（渴的）—thirstier—thirstiest ugly（丑的）—uglier—ugliest 5.双音节、多音节形容词，在单词前面加上 “more” “most” 构成比较级、最高级： afraid（害怕的）—more afraid—most afraid beautiful（美丽的）—more beautiful—most beautiful c areful（仔细的）—more careful—most careful cheerful（开心的）—more cheerful—most cheerful crowded（拥挤的）—more crowded—most crowded dangerous（危险的）—more dangerous—most dangerous delicious（美味的）—more delicious—most delicious difficult（困难的）—more difficult—most difficult exciting（令人兴奋的）—more exciting—most exciting expensive（昂贵的）—more expensive—most expensive famous（著名的）—more famous—most famous frightened（受惊的）—more frightened—most frightened frightening（令人害怕的）—more frightening—most frightening hard-working（勤奋的）—more hard-working—most hard-working helpful（有帮助的）—more helpful—most helpful honest（诚实的）—more honest—most honest important（重要的）—more important—most important interesting（有趣的）—more interesting—most interesting polite（有礼貌的）—more polite—most polite terrible（可怕的）—more terrible—most terrible tired（累的）—more tired—most tired 6.不规则变化的形容词： bad（坏的）—worse—worst far（远的）—farther—farthest (far—further—furthest) good（好的）—better—best ill（病的）—worse—worst little（少的）—less—least many（多的）—more—most much（多的）—more—most well（好的，身体好的）—better—best old（年老的）—older—oldest ( old—elder—eldest) 本文来源：https://www.wddqw.com/doc/78ecf94676eeaeaad1f330a3.html