形容词的比较级和最高级一．形容词的比较级和最高级的用法在英语中，在表示两者作比较时，形容词要用特别的形式，称为“比较级”，三者及三者以上作比较时用“最高级”，原来的形容词称为“原级”。
e.g. You look taller than me .你比我高。
You are heavier than me.你比我重。
I am the strongest in my class. 我是我们班最强壮的。
二.形容词比较级和最高级句型结构1.比较级句型：主语A+ be 动词 + 形容词比较级 + than + B A……比B……e.g. He is older than me.他比我年长。
【拓展】比较级的其他表达方式①"the+形容词比较级+of the two+……"表示"...是两者中较…的"。
e.g. He is the heavier of the two boys.Look at the two boys. My brother is the taller of the two.②"比较级+and+比较级"表示"越来越……"。
e.g. He is getting taller and taller.他越来越高。
③"the+比较级，the+比较级"表示"越……越……"。
e.g. The more careful you are，the fewer mistakes you'll make你越细心，就会越少犯错误。
he more we get together, the happier we will be.我们聚得越多，我们就越开心The harder you work , the better you'll be.你越努力工作，你就会变得越好。
辅助练习：1. Jim is _______ than all the others. (tall)2. Things are getting _______ and _______. (bad)3. The higher you climb, the _______ it will be. (cold)2.最高级句型：主语 + be动词 + the + 形容词最高级 + 介词短语（介词短语：in my class ,in the room ,in the hall …）e.g. He is the tallest in our class.【拓展】最高级的其他形式①"主语+be+ one of the+形容词最高级+复数名词+in/of短语"表示"……是……中最……之一"e.g. Beijing is one of the largest cities in China.②序数词+最高级e.g. Hainan Island is the second largest island in China.辅助练习：1.The changjiang river is ____________________ (long) river in China.2. The Yellow River (Huang He) is ________________ （第二长）river in China3.A.形容词的比较级和最高级变化规则B. 部分双音节与多音节的词比较级在原级之前加more, 最高级在原级之前加most beautiful---more beautiful---most beautifulinteresting--- more interesting –most interestingdifficult--- more difficult – most difficultC.不规则变化的形容词:little / few - less – least good – better - bestbad/ill - worse – worst far -- farther/further—farthest/furthestmany/much – more – moste.g. 比较一下下列句子，领悟原级、比较级、最高级的用法。
Tom is tall.他很高。
Tom is as tall as John.汤姆和吉姆一样高。
Bob is taller than John.鲍勃比约翰高。
John is the tallest of the three.约翰是三个当中最高的一个。
John is the tallest in his class.约翰在他们班最高。
【课外拓展】1.在比较等级中常用much, a lot, far, even等常修饰比较级，表程度。
e.g.姚明比我高多了。
Yao Ming is very taller than I. （误）Yao Ming is much taller than I.（正）2.在比较等级的句型中，比较的双方必须是同类事物，否则会引起歧义。
即人与人，物与物的比较。
e.g. 他的尺子比我的长。
His ruler is longer than me.（误）His ruler is longer than mine.（正）3.形容词最高级前一般有定冠词，但如果前边也有物主代词，名词所有格等词来修饰时，定冠词the常被省略。
e.g.加里是我最好的朋友。
Gary is my the best friend. （误）Gary is my best friend. （正）4. 形容词比较级前一般不加定冠词，但句中有“of the two”结构表示“两者中较…的一个”时，定冠词the要加上。
e.g.苏珊是这两个女孩子当中较胖的一个。
Susan is fatter of the two girls. （误）Susan is the fatter of the two girls. （正）同步练习：一、选择题。
1. She is ________ than ________ .A. busier / usB. busier / weC. more busy / usD. more busy / we2. Jane is ________ than Betty.A. less tallerB. less tallestC. less tallD. not as tall3. China is ________ country in the world.A. the third largestB. the largest thirdC. the third largeD. a third largest4. -Which is ____ season in Beijing? -I think it's autumn.A. goodB. betterC.best D. the best5．- Which is__________ , the sun, the moon or the earth?-- Of course, the moon is.A. smallB. smallerC. smallestD. the smallest6.The air in Beijing is getting much _____ now than a few years ago.A. cleanB. cleanerC. cleanestD. the cleanest7. Mobile phones are very popular now and they are _____ than before.A. cheapB. cheaperC. cheapestD. the cheapes8．I study English as_______ as my brother.A. hardB. harderC. hardestD. the hardest9. Which is _____ , a bicycle or a computer?A. expensiveB. more expensiveC. the most expensiveD.expensiver10. The Yellow River is one of ______rivers in China.A. longB. longerC. the longestD. longest二、写出下列单词的比较级和最高级。
1. nice _________________________2. fat ______________________________3. slow _________________________4. dry _________________________________5. happy ________________________6. wet _________________________________7. much __________________________ 8. ill ________________________________9. little __________________________ 10. bad _____________________________三. 根据句意，用所括号内所级形容词的正确形式填空。
1. Mr. Smith is ____________ man in this office. (rich)2. Winter is _____________ season of the years. (cold)4. It is much _________ today than yesterday. (hot)5. She is a little ________ than her classmates. (careful)6. Bob is _________ ( young ) than Fred. but _________ (tall) than Fred.7. Almost all the students' faces are the same ,but Li Deming looks _______ (fat) than before after the summer holidays.8.Which is _________ (heavy), a duck or a chicken?9. An orange ia a little ______ (big) than an apple, but much ________ (sm all) than a watermelon.10.-- How _________ (tall) is Sally?--She' s 1.55 metres ________ (tall). What about Xiaoling?-- She' s only 1.40 metres ________ (tal)l) She is much _______ (short) than Sally.2) She is also the _______ (short) girl in the class.四、课堂总结：和学生一起，对本次课的主要内容作总结概括，并用红笔留痕。