双音节形容词的比较级

1、单音节词末尾加-er（比较级）,-est（*）
【例】 原级 比较级 *
great greater greatest
small smaller smallest
clean cleaner cleanest
2、单音节如以e结尾,只加-r（比较级）,-st（*）
【例】 fine finer finest
nice nicer nicest
wide wider widest
3、闭音节单音节词如末尾只有一个辅音字母,须先双写这个辅音字母,再加-er（比较级）,-est（*）
【例】 big bigger biggest
hot hotter hottest
red redder reddest
4、少数以-y,-er,ow,-ble结尾的双音节词,末尾加-er（比较级）,-est（*）.以-y结尾的词,如-y前是辅音字母,则变y为-i,再加-er和-est.以-e结尾的词只加-r和-st.
【例】 clever cleverer cleverest
narrow narrower narrowest
able abler ablest
easy easier easiest
5、其它双音节和多音节词皆在前面加单词more和most.
【例】 careful more careful most careful
difficult more difficult most difficult
delicious more delicious most delicious
不规则变化 -原级 比较级 *
good/well better best
bad worse worst
many/much more most
little less least
far farther/further farthest/furthest