一、在词尾加- er 和 est原级比较级；表示更最高级;表示最short 矮的shortershortesttall高的tallertallestlight轻的lighterlighteststrong强壮的strongerstrongestweak弱的weakerweakestslow慢的slowerslowestfast快的fasterfastestyoung年轻的youngeryoungestold老的，旧的olderoldestloud大声的louderloudestlong长的longerlongestsmall小的smallersmallestnew新的newernewestcold冷的coldercoldestbright明亮的brighterbrightestsmart聪明的smartersmartestkind友好度kinderkindestsweet甜的sweetersweetestthick厚的thickerthickestclean干净的cleanercleanestclever聪明的cleverercleverest二、以-e结尾的只加 r和 st 原级比较级最高级late 迟到laterlatestlarge大的largerlargestbrave勇敢的braverbravest三、辅音加y结尾的，变y为i, 再加 er 或 est原级比较级最高级healthy健康的healthierhealthiestheavy重的heavierheaviestlazy懒的lazierlaziesteasy容易的easiereasiestsalty咸的saltiersaltiestnoisy吵闹的noisiernoisiestfunny有趣的funnierfunniestnaughty调皮的naughtiernaughtiestpretty可爱的prettierprettiestearly早的earlierearliestdirty脏的dirtierdirtiest四、双写辅音字母再加 -er 和 -est 原级比较级最高级hot热的hotterhottestbig大的biggerbiggestfat肥的fatterfattestthin瘦的thinnerthinnestwet湿的wetterwettest五、双音节词和多音节词都加 more 或 most原级比较级最高级important重要的more important the most importantdangerous危险的more dangerous the most dangeroushonest诚实more honest the most honestbeautiful漂亮的more beautiful the most beautifulfamous著名的more famous the most famousinteresting有趣的more interesting the most interestingexciting令人兴奋的more exciting the most excitingdelicious美味的more delicious the most deliciousdifficult困难的more difficult the most difficult六、不规则变化原级比较级最高级good/well好的betterbestbad/ill 坏/的worseworstmany/much许多的moremostfar远的farther/ furtherfarthest/ furthestlittle 小的less leastold 老的，旧的Older/elderOldest/eldest