形容词的比较级和最高级
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
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
