形容词/副词比较级与最高级
一、一般情况下（单音节以及部分双音节）加er或est small→smaller→smallest tall→taller→tallest
hard→harder→hardest fast→faster→fastest
cold→colder→coldest warm→warmer→warmest clear→clearer→clearest quick→quicker→quickest sad→sad er→sadest loud→louder→loudest strong→stronger→strongest short→shorter→shortest great→greater→greatest few→fewer→fewest
clever→cleverer→cleverest quiet→quieter→quietest 二、以不发音的字母e结尾（单音节）加r或st
large→larger→largest nice→nicer→nicest
safe→safer→safest fine→finer→finest
late→later→latest wide→wider→widest simple→simpler→simplest
strange→stranger→strangest
三、一个元音加一个辅音字母结尾，双写辅音加er或est fat→fatter→fattest
thin→thinner→thinnest
slim→slimmer→slimmest
wet→wetter→wettest
big→bigger→biggest
red→redder→reddest
hot→hotter→hottest
fit→fitter→fittest
四、辅音字母加y结尾，变y为i加er或est
easy→easier→easiest angry→angrier→angriest busy→busier→busiest heavy→heavier→heaviest hungry→hungrier→hungriest crazy→crazier→craziest happy→happier→happiest early→earlier→earliest dirty→dirtier→dirtiest lucky→luckier→luckiest shy→shier→shiest funny→funnier→funniest lovely→lovelier→loveliest friendly→friendlier→friendliest 五、双音节以及多音节词前加more或most
outgoing→more outgoing→most outgoing
beautiful→more beautiful→most beautiful
different→more different→most different
quietly→more quietly→most quietly
loudly→more loudly→most loudly
slowly→more slowly→mo st slowly
quickly→more quickly→mo st quickly
sadly→more sadly→mo st sadly
happily→more happily→mo st happily
carefully→more carefully→mo st carefully
serious→more serious→most serious
similar→more similar→mo st similar
easily→more easily→most easily
clearly→more clearly→mo st clearly
bored→more bored→mo st bored
talented→more talented→mo st talented
boring→more boring→mo st boring
popular→more popular→mo st popular
terrible→more terrible→mo st terrible
delicious→more delicious→mo st delicious
different→more different→mo st different
difficult→more difficult→mo st difficult
beautiful→more beautiful→mo st beautiful expensive→more expensive→mo st expensive necessary→more necessary→mo st necessary important→more important→mo st important wonderful→more wonderful→mo st wonderful comfortable→more comfortable→mo st comfortable hardworking→more hardworking→mo st hardworking
不规则adj、adv比较级、最高级
good/well→better→best
bad/badly/ill→worse→worst
many/much→more→most
few/little→less→least
old→older/elder→oldest/eldest
far→farther/further→farthest/furthest
无比较级的adj/adv
fantastic excellent favorite true(ly) false right wrong full empty round square possible impossible