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
