short shorter shortest

1 在单音节形容词和部分以-er , -ow , -ble , -ple 结尾的双音节词后面直接+ershort的最高级；+est

例：warm → warmer → warmest high → higher →highest

slow → slower → slowest able → abler → ablest

simple → simpler → simplest

2 形容词，副词以e结尾时→+r；+st

例：nice → nicer → nicest

large → larger → largest

3 形容词，副词以辅音+y结尾时→变y为i+er；+est

例：busy → busier → busiest happy → happier → happiest

**** shy → shier → shiest / shyer → shyest

sly → slier → sliest / slyer → slyest

4 以一个辅音字母结尾的重读闭音节的形容词或副词→双写词尾字母再+er；+est

例：hot → hotter → hottest big → bigger → biggest

5 多音节词（3个或3个以上音节）和部分双音节的词在前面加→ more～；most～

例：beautiful → more beautiful → most beautiful

useful → more useful → most useful

famous → more famous → most famous

6 不规则变化：

原级

比较级

最高级

good ∕well

better

best

many / much

more

most

bad∕badly∕ill

worse

worst

little

less

least

far

① farther

② further

① farthest

② furthest

old

（GA）older

（GB）①older

（GB）②elder

（GA）oldest

（GB）①oldest

（GB）②eldest