单音节 去Y加IER构成比较级去Y加iest构成最高级,比如early--->earlier--》the earliest
多音节 more/most 比如 quickly-->more quickly--.the most quickly
不一定的,有的是加more/most,eg: more careful,most careful, 面有的是把y换成i,再在后加er/est, eg: happier ,happiest
more/most
no such thing as moreier or moreiest WRONG