1.一般在词尾直接加er或est， tall-taller-tallest，long-longer-longest
2.以不发音的字母e结尾的单词在词尾直接加r或st， nice-nicer-nicest
3.以辅音字母+y结尾的词，把y变为i，再加er或est， heavy-heavier-heaviest
4.重读闭音节，末尾只有一个辅音字母，双写这个辅音字母，再加er或est， big-bigger-biggest
注: 大,红,湿,热,悲,瘦,胖.双写末辅再变级.（big/red/wet/hot/sad/thin/fat ）
5.部分双音节词和多音节词分别在原级前加more构成比较级和most构成最高级， (more/most)Beautiful/interesting/comfortable/comfortably/quick/cheaply/quietly/outgoing/serious/loudly/important/clearly/expensive/popular/talented/exciting
注:表示否定意义在其前加less /least important----less important----least important
English is more interesting than Chinese =Chinese is less interesting than English .
6.由 “形容词+ly”构成的副词,在其前加more/ most
slowly---more slowly----most slowly；但early—earlier---earliest
二、不规则变化 原级 比较级 最高级good/well
better
best
many/much
more
most
little
less
least
old
old / elder
old /eldest
bad/badly/ill
worse
worst
far
farther (距离)/further（程度）
farthest /furthest
注: 形容词,副词同形有: back , high , well ,fast, early, late ,straight
Ⅳ形容词，副词等级的用法 一、原级的用法1.只能修饰原级的词，very，quite，so，too
He is too tired to walk on.
My brother runs so fast that I can’t follow him.
2.原级常用的句型结构（1）A+ as +adj / adv的原级+ as +B
表示 “A和B一样”Tom is as old as Kate.
Tom runs as fast as Mike.
（2）A +not+as/so+形容词原级+as+B 表示 “A不如B…”
This room is not as/so big as that one.
He doesn’t walk as slowly as you.
二、比较级的用法 1.可以修饰比较级的词.much，a lot，far，…的多a little，a bit，…一点儿even甚至，still仍然
Lesson One is much easier than Lesson Two. Tom looks even younger than before.
2.比较级常用的句型结构“甲+形容词/副词的比较级+than+乙”表示“甲比乙…”
Tom is taller than Kate.
I got up earlier than my mother this morning.
三.最高级的用法1).结构: the +最高级+ in/of等比较范围
He is the tallest of all the boys
He works hardest in his class .
注:副词的最高级前the 可省掉
2).the +序数词+形容词的最高级+单数名词
The Yellow River is the second longest river in China .
3).one of +the +形容词的最高级+复数名词
He is one of the cleverest students in our class.
4). “特殊疑问词+be+the+最高级+甲，乙，or丙？”用于三者以上的比较。
Which season do you like （the） best，spring，summer or autumn？
5）.比较级+than any other+名词单数（比较级表示最高级的用法）
This is more difficult than any other book here .
这些书中这本最难2).比较级与最高级的转换
a). the +最高级+ of / in ……
b). 比较级+than+any other +单数名词
+the other +复数名词
+anyone else
+any of the other+复名
c). Nobody else + 比较级 + than ……
Tom is the tallest boy in our class .
五.级别的惯用法1. “比较级+and+比较级”表示“越来越……”。
He is getting taller and taller.
2. “the+比较级，the+比较级”表示“越……，越……”。
The more careful you are，the fewer mistakes you’ll make.
4.当adj 的最高级前有物主代词,名词所有格,指示代词时,不用the .
This is my best book of all.
7.有些含有比较级的句子里，常用that(单数、不可数名词)、those (复数名词)代替前面提到的词，以避免重复。
The weather in Beijing is colder than ____ in Guangzhou in winter .
Funny funnier funniest Hard harder hardest Friendly friendlier friendliest Good/well better best Many/much more most Fast faster fastest Big bigger biggest Fat fatter fattestThin thinner thinnest Easy easier easiest Heavy heavier heaviest Brave braver bravest Happy happiest Cheap cheaper cheapest Smart smarter smartest Close closer closest High higher highest Fine finer finest Nice nicer nicest Quiet quieter quietest Strong stronger strongest
