形容词的比较级专项一、变化规则；1、规则变化：(1)单音节形容词的比较级和最高级形式是在词尾加 -er 和 -est 构成。
great-greater- greatest(2) 以 -e 结尾的单音节形容词的比较级和最高级是在词尾加 -r 和 -st 构成。
wide-wider-widest(3)少数以-y, -er, -ow, -ble结尾的双音节形容词的比较级和最高级是在词尾加 -er 和 -est 构成。
clever-cleverer-cleverest(4) 以 -y 结尾,但 -y 前是辅音字母的形容词的比较级和最高级是把 -y 去掉,加上 -ier 和-est 构成.happy-happier-happiest(5) 以一个辅音字母结尾其前面的元音字母发短元音的形容词的比较级和最高级是双写该辅音字母然后再加 -er和-est。
big-bigger-biggest(6) 双音节和多音节形容词的比较级和最高级需用more 和 most 加在形容词前面来构成。
more beautiful (比较级) more difficult (比较级)most beautiful (最高级) most difficult (最高级)(7) 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 better best many more most much more mostbad worse worst ill worse worst little less least注：只有少数形容词和副词有两种比较级和最高级形式：clever- cleverer- cleverest或clever - more clever - most cleverfar - farther/further - farthest/furthest old-older-oldest 或old-elder-eldest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 w e 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 ho t 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. tired B. more tired C. more tireder D. much tired2. Which do you like _____, coffee, tea or milk? A. the worst B. worse C. the worse D. 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。