1.cool cooler coolest
2.wet wetter wettest
3.late later latest(注意:该单词除了表late的最高级外,本身有含义)
4.easy easier
5.large larger
6.old older
7.tall taller
8.lazy lazier
9.heavy heavier
10.lucky luckier
11.fat fatter
12.thin thinner
13.big bigger