直接加er:(
单音节形容词)
great, tall,cheap,old,young,long,short,warm,cool,near
以e结尾加r:
wide,nice,large,cute,fine,safe,late,able
变y为i加er:
happy,heavy,early,drt,hungry,pretty,thirsty,busy,lucky,funny
双写辅音字母加er:
hot,thin,big,red,fat,wet,sad
加most/more:(
双音节)
important, beautiful,useful,rapidly,expensive,quickly,difficultly,popular