形容词的比较级和最高级英语中大多数形容词是可以分级的，一般有三个等级：原级，比较级和最高级。
原级形容词的本来形式就是形容词的原级。
用原级进行比较时可以使用下面两种结构：1. 表示比较的双方相等，用”as…as”结构，表示“前者像后者一样”，即A + be + as + 形容词原级+ as + B.e.g. John is as tall as his brother.2. 表示比较的双方不相等，用”not as…as”结构，表示“前者不如后者”，即A + be + not as + 形容词原级+ as + B.e.g. John is not as tall as his brother.比较级当把一个人或物同另外一个人或物比较时，就需要用到形容词比较级。
其结构是：A + be + 形容词比较级+ than + B.e.g.Jackei is taller than Alex, but Alex is heavier than Jackei最高级三者或者三者以上的人或物进行比较时，需要使用形容词的最高级。
其结构是：A + be + the 形容词最高级+ of / in + 比较范围.(Note: 形容词最高级前面要加定冠词the)e.g. Jackei is the tallest in our class. orJackei is the tallest of all the students.比较级的几种用法：1，表示倍数，A+be+数词+times+形容词比较级+than+BOur room is twice larger than theirs.我们的房间是他们的两倍大注：两倍为twice而不是two times.2，表示大多少，多多少，高多少等A+be+数量词+比较级+than+BShe is two years older than me她比我大两岁3，用比较级表示最高级A+be+比较级+than+any other+单数名词，或者，A+be+比较级+than+the other+复数名词 He is taller than any other student in the class.他比班上其他的同学都高。
4，两个中比较……的A+the+比较级+of the twoHe is the cleverer of the two他是这两个中比较聪明的5，越来越……More and more 注：这里的more代表比较级，而不是说一定是more,如，说，越来越聪明就该说，cleverer and cleverer.一般和动词get,become（变得）连用He is getting more and more handsomeIt is becoming cheaper and cheaper5, 越……就越……The more……the more 注：此处的more和上面一样，代表比较几The richer you are, the happier you will be6, more than多余，超过，相当于over，less than少于，不足。
He is more than(over) 80 years oldI have less than five yuan.7, 修饰比较级的程度可用a lot, many, far,a bit,much,等，但不能用very quite等I feel much better now我现在感觉好多了。
形容词不同级别的变化1. 规则形容词的变化2. 不规则形容词的变化补充须注意的：一、从结构上看，比较级前面不能用very,so,too, quite等作修饰词，但为了表示比较级的程度，可以用much,a lot,a little,a bit,even,still等作修饰词。
例如：This box is much heavier than that one.这只箱子比那只箱子重得多。
另外，比较级后面往往用连词than连接另一个比较的人或事物，但在上下文明确的情况下，形容词比较级可单独使用。
例如：This ruler is very long,but that one is longer.这把尺子很长，那把尺子更长。
形容词最高级前通常要加the。
但是，当形容词最高级前有序数词、物主代词、指示代词、名词所有格等限定词修饰时，最高级前不加the。
如：The Chang jiang River is the longest river in China.长江是中国第一大河。
He is our best teacher.他是我们最好的老师。
最高级后面往往用of或in介词短语来表示形容词的最高级的比较范围。
of短语所指的范围通常是一群人或一些事物，而不是一个场所；如果指一个场所，则用介词in。
例如：He is the strongest of the three.他是三个人中身体最强壮的。
He is the strongest in our class.他是我们班里身体最强壮的。
二、从范围上看，如果在同一范围内，形容词的比较级必须把自己排除掉，即自己不能与自己相比，而最高级必须包含自己。
例如：1.他比他班的任何一个学生都高。
误：He is taller than any student in his class.(he包括在any student里面)正：He is taller than any other student in his class.(any other student里面已排除了he)2.这块手表是所有手表中最好的。
误：This watch is the best of all the other watches.(all the other watches不包含前面的this watch) 正：This watch is the best of all the watches.(all the watches包含前面的this watch)注意：如果不在同一范围内，比较级就不必把前面的主语排除掉。
例如：Shanghai is larger than any city in Australia.上海比澳大利亚任何城市都大。
(上海不属于澳大利亚，所以city前不必加other)试比较：Shanghai is larger than any other city in China.上海比中国任何一座城市都大形容词的比较级专项一、变化规则；1、规则变化：（1）单音节词和少数双音节词一般在词尾加er或est：bright _____ ______; 以不发音的e字母结尾的加r,或st：large; 以辅音字母加y结尾的变y为I加er或est:easy；以一个辅音字母结尾的重读闭音节词双写最后一个辅音字母再加er或est: big 以er，ow结尾的双音节词加er 或est:clever slow（2）多音节词前加more或most, 副词最高级前省略the.(3) 部分形容词本身表示最高级，因此他们没有比较级和最高级形式：favourite round2、不规则变化：good, well; bad, badly, ill; much, many; little; far; old;注：只有少数形容词和副词有两种比较级和最高级形式：clever old far二、形容词各等级的用法：1、原级（同级）比较：as…as…; not as(so)…as…We’ll give you as much help as we can.She isn’t as(so)active in sports as before.2. 比较级：表示两者之间比…… 更……可用状语much, a little, even等修饰：He made fewer mistakes than I did.He is even richer than I.3、高级：形容词最高级前必须加the, 副词最高级前常省略the，后面多用of……，in……短语表示范围：It was the most/least interesting story I have ever listened.He is the tallest of the three.4、如果在两者之间表示“最……”时要在比较级前加the，而且还用of the two, of the pair 短语：John is the clever of the two boys.Of the two boys, John is the clever.三、重点与难点：1、as…as…结构：你和汤姆是一样好的孩子。
You’re a boy as good as Tom.=You’re as good a boy as Tom.2、(1)too…to与so…that sb.can’t…的句型转换：前者为简单句，主语只有一个，而后者为复合句，主语有两个，试比较：The man was too angry to be able to speak.The man was so angry that he wasn’t able to speak.The milk was too hot to drink.The milk was so hot that we can’t drink it.(2) too…to…与not enough to句型的转换：He is too young to get married.=He is not old enough to get married.The book is too difficult for me to read.=The book is not easy enough for me to read.3、形容词原级表示比较级含义：约翰不象迈克那么苯。
John is not so stupid as Mike.John is less stupid than Mike.John is cleverer than Mike.4、用比较级表示最高级：约翰是班里最高的男生。
John is taller than any other boy in the class.John is the tallest boy in the class.John is taller than :any other boy.any of the other boy.all the other boy.any of the others.any one else.5、the more….. the more….表示“越……越……”:The more books you read, the wider your knowledge is.The more food you eat, the fatter you are.6、more and more….表示“越来……越……”:More and more students realized the importance of a foreign language.Our country is getting stronger and stronger.四、巩固练习：（一）写出下列形容词与副词的比较级与最高级形式：long_____ ______ wide ______ _______ fat ____ _____heavy____ ______ slow ______ _______ few____ _____brightly______ -_____ bably _____ _______ far____ _____quickly _____ ______ happy_____ -______ unhappy________(二)用所给词的正确形式填空：1. Of the two girls, I find Lucy the _______ (clever).2. Gold(黄金) is ______ (little) useful than iron(铁).3. My sister is two years _______ (old ) than I.4. John’s parents have four daughters, and she is the _____ (young) child.5. The _____ (cheap) bags are the not usually the best ones.6. The short one is by far _______ expensive of the five.7. The boy is not so ______ (interesting) as his brother.8. Dick sings _____ (well), she sings ______(well) than John, but Mary sings______(well) in her class.9. She will be much ______ (happy) in her mew house.10. This dress is ______ that.(twice, as…as…, expensive)(三)选择填空：1．He feels _____ today than yesterday.A. tiredB. more tiredC. more tirederD. much tired2. Which do you like _____, coffee, tea or milk?A. the worstB. worseC. the worseD. worst3. Of the two toys, the child chose_____.A. the expensive oneB. one most expensiveC. a least expensiveD. the most expensive of them4. The line is ____ than that one.A. more longerB. not longerC. much more longerD. many more longer5. The earth is _____ the moon. A. as 49 times big asB. 49 times as bigger asC. 49 times as big asD.as big as 49 times6. The book is ____ of the two.A. thinnerB. the thinnerC. more thinnerD. the thinnest7. She looks _____ than she does.A. the more olderB. very olderC. much olderD. more older8. The garden is becoming ______.A. more beautiful and moreB. more beautiful and beautifulC. more and more beautifulD. more beautiful and beautifuler9. They competed（比赛）to see who could work _____.A. the fastest and bestB. the faster and the betterC. fastest and betterD. faster and better10.______ hurry, _______speed.A. More, lessB. Much, littleC. The more, the lessD. The much, the little11. This kind of coffee is different ______.A. and it is also betterB. and better than the otherC. but also than othersD. from the other, and better(四)翻译句子：1．本书跟那本书一样有趣。