一、 形容词的比较级和最高级变化规则；
1、规则变化：
（1） 单音节词和少数双音节词一般在词尾加er或est：
如: small --—smaller -—— the smallest
（2) 以不发音的e字母结尾的加r,或st：
如: late --- later ——- the latest
(3） 以辅音字母加y结尾的变y为I加er或est：
如： easy -—- easier -—— the easiest
(4）以一个辅音字母结尾的重读闭音节词双写最后一个辅音字母再加er或est：
如： big ——- bigger —-- the biggest
以er，ow结尾的双音节词加er 或est
如: slow -—— slower --— the slowest
(5） 多音节词前加more或most, 副词最高级前省略the。
如： important ——- more important -—— the most important
2。不规则变化
good / well --— better --— the best 好
bad / badly / ill --- wor —-— the worst 坏
many / much --— more ——— the most 多
little --- less -—- the least 少
old -—— older / elder —-— the oldest / the oldest 老, 旧
far —-- farther / further ——— the farthest / the furthest 远
常见形容词比较级、最高级变化一览表
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 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 clo（接近的）—clor—clost 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
wi（睿智的,聪明的）—wir-wist 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
4.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
careful（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
