一、形容词副词的比较级与最高级变化规则
1.单音节形容词或副词后面直接加-er或-esttall—taller—tallest
fast—faster—fastest2.以-e结尾的单音节形容词或副词直接加-r或-stlarge—larger—largest
nice—nicer—nicest3.以-y结尾的形容词或副词，改-y为-i再加-er或-estbusy—busier—busiest
early—earlier—earliest4.形容词或副词是重读闭音节时，双写最后的辅音字母，再加-er或-esthot—hotter—hottest
big—bigger—biggest5.多音节形容词或副词前面直接加more或mostdelicious—more delicious—most deliciousbeautiful—more beautiful—most beautiful
important---
more important-- most important6.不规则变化good (well)—better—best
bad (badly)—worse—worst
many/much--more--most
little--less--least (注意：few--fewer--fewest)
far--farther--farthest
far--further--furthest 二、形容词、副词的比较级和最高级的句子公式
比较级的修饰语常见的有：much, even ，rather, still, a lot，a little，a bit，a great deal，far, by far，any(用于否定句或疑问句)等。
高级的修饰语常见的有：序数词，by far, nearly, almost, by no means, not really, not quite, nothing like等。
eg.the first longer river第一长河
句子公式：
1.A +be+ 形容词比较级 + than + Beg.
I am taller than you.2.A +be+ the + 形容词最高级 + 比较范围eg.
I am the tallest in my class.3.A +动词+ 副词比较级 + than + Beg.
Emu run faster than kangaroo.4.A +动词 + 副词最高级+ 比较范围eg.
Emu run fastest in the world.
5.the＋比较级＋of (the)＋名词/代词 “(两者中)较……的”
Tom is the more hardworking boy of the two.
比较级表最高级的含义
(1)形容词或副词的比较级＋than＋any(other)＋单数可数名词/any of the other＋复数名词/the others/any of the others表示“某人/某物比同一范围内的任何一个人/物都……”，含义是“某人/某物最……”。
Tom is always studying harder than any other boy in the class.
汤姆总是比班里其他男孩学习努力。
(2)“never…a/an＋比较级＋单数名词”表示“没……比这更……”。
I have never read a more interesting novel.
我从来没读过比这更有意思的小说。
三、形容词、副词的特殊结构
(1)the＋比较级＋…，the＋比较级＋…，意为“越……，就越……”。
The harder you work, the more progress you will make.
你工作越努力，你取得的进步就越大。
(2)比较级＋and＋比较级，意为“越来越……”。
Our motherland will become more and more powerful.
我们的祖国将变得越来越强大。
(3)no＋比较级＋than…，意为“两者都不……”。
The film is no better than that one.
这两部电影都不好。
(4)more…than…，意为“与其……不如……”。
He is more shy than frightened.
与其说害怕，不如说他害羞。
(5)can"t＋…＋enough/too…，意为“再……也不为过”。
You can"t be careful enough when driving a car.
开车时，你再小心也不为过。
(6)the last表示“最不可能的”“最不适合的”“最不希望的”等。
The last thing they want is to work in the red areas where life is hard.
他们最不乐意的是在生活艰难的红色区域里工作。
练习：
1．The__________ (hard) you try to beat him, the more likely you will get hit.(辽宁)
2．I am convinced that my oral English __________________(会变得越来越好)．
3．I can"t say thank–you __________much.I couldn"t have succeeded without your help.
4．I have always enjoyed all the events you organized and I hope to attend __________(更多的) in the coming years.(浙江)
5．My math is no better than his.我和他的数学都不好。
6．He is more hardworking than clever.与其说他聪明，不如说他勤奋。
四、表示倍数的几个常考句型
(1)A is＋倍数＋as＋形容词/副词的原级＋as B
(2)A is＋倍数＋形容词/副词的比较级＋than B
(3)A is＋倍数＋the＋性质名词(length/width/height/ weight/size)＋of B
1．It"s said that the power plant is now __________(two) as large as what it was.(安徽)
2．This restaurant wasn"t__________(有……的一半好) that other restaurant we went to.(全国课标卷Ⅰ)
3．这间房子是那间房子的三倍大。
The room is 3 times as big as that one.
①＝The room is______________ than than one.
②＝The room is 3 times ____________ of that one.
【答案】1.twice2.half as good as3.① twice bigger
②the size
注意隐形比较级
1．Andy is content with the toy.It is__________(good) he has ever got.(四川)
It may not be a great suggestion.But before a __________ (good)one is put forward, we"ll make to deal with it.(课标II)
I am glad that I have two good friends.Jack is the 1.__________(diligent) of the two and in fact 2.__________(diligent) in our class.He is the second 3.__________(tall) in our school.He does 4.__________(good) in maths.But at first his English was 5.________(poor)than mine.He had many more English grammar books than anyone else, but he seldom read and spoke.So my spoken English was better by far 6.__________ his.With the help of the English teacher and classmates, he has improved his method of studying.Since the beginning of last term, he has been speaking much more English than I．On the whole, he practices 7.__________(two) as much as I．The more he practices, the 8.__________(great) progress he has made.Many people say that my English is not 9.__________ good as his now.Of course I am proud of him.My 10.__________(old) sister say that I must learn from Jack and study as hard as he does.
【答案及解析】
1．more diligentthe＋adj.的比较级＋of the two 表示“两者之中较……的一个”。
2．the most diligent多音节形容词的最高级使用“the most＋形容词原级”的形式。
3．tallest根据句意此处考查最高级，tall的最高级为tallest。
4．welldo well in 意为“在某方面擅长”。
5．poorer根据than可知此处使用poor的比较级形式。
6．than根据better可知后面使用than进行比较。
7．twice此题考查倍数句型，表示两倍使用twice。
8．greater此题考查the more…the more…句型。
9．as/so句意：我的英语不如他的好了。as…as…的否定句型为：not as/so…as…。
10．elder本题考查old的比较级。
