《比较级和最高级》PPT课件

英语专题： 形容词的比较级和最高级 专题：形容词，副词比较级、最高级 (一 ) 1. 形容词，副词比较级和最高级的概念。 形容词和副词可以靠改变形式来表示程度的 不同。我们把这种变化形式叫做比较等级。 要比较两个或两个以上的人或物时，就必须 用形容词的比较级和最高级。 形容词、副词有三个级：原级 (Positive Degree)，比较级 (Comparative Degree)和最 高级 (Superlative Degree)。 写出下列词的反义词 tall- thin- long- funny- Sad- short heavy short serious happy 形容词的比较级和最高级的构成方法 ： 单音节和少数双音节形容词、副词的规则变化情况： a. 在原级的词尾加 -er变为比较级，加 -est变为最高级。 e.g. short(原级 )-shorter(比较级 )-shortest(最高级 ) long(原级 )-longer(比较级 )-longest(最高级 ) b. 如原级以 e结尾，则比较级只加 -r，最高级只加 -st。 e.g. large-larger-largest nice-nicer-nicest c. 如原级以“辅音字母 +y”结尾，要将 y改为 i，再加 -er， -est。 e.g. busy-busier-busiest easy-easier-easiest d. 原级以重读闭音节结尾，而且末尾只有一个辅音字母 (不 含字母组合 er等 )，要双写这个辅音字母，再加 -er， -est。 e.g. fat-fatter-fattest big-bigger-biggest 2. 其他双音节词和多音节词都在前面加 more, most构成比较级及最高级： 原级 比较级 最高级 important more important most important difficult more difficult most difficult interesting more interesting most interesting useful more useful most useful serious- beautiful- interesting- important- difficult- good delicious- More serious more beautiful more interesting more important more difficult better more delicious 写出下列词的最高级形式 tall- bad - friendly - little- old- tallest worst the most friendly least oldest 3. 形容词比较级的用法和相关句型。 表示两者“相等”用“ as+形容词原级 +as+比较对象”。 e.g. He is as tall as his mother English is as interesting as math. 表示“不如”或“不相等”用“ not +as so+形容词原级 +as+比较对象”。 e.g. It is not so as cold today as yesterday Jack is not so/as tall as Tom. 表示倍数，如“一半两倍 /3倍 4倍 ” 等用“ half twice three four times +asas” 结构。 e.g. I study twice as hard as you This room is three times as large as that one. 用“形容词比较级 +than引导的从句”进行两者的比较。 e.g. The earth is bigger than the moon This dress is more expensive than that one. 强调比较级超出比较程度时，形容词的比较级前 可用 much， far， a lot， no， a little， even， any,等 状语来修饰。 e.g. My brother is much older than I. This bike is far better than that one. 由 and连接同一个形容词的两个比较级，可以表 示“越来越 ” 。 e.g. I think English is becoming more and more difficult. 用“ the+比较级 +the+ 比较级 ” ，表示 “越 就越 ” 。 e.g. The more you read， the more knowledge you will get The less junk food you eat, the healthier you feel. 比较级 + of the two 表示两者中较 的（比 较级前加 the） John is the clever of the two boys. Of the two boys, John is the clever. 最高级 +of 或 in 表示 中最 的 Eg: Jack is the tallest in their class. China is the largest one of all the Asian countries.(注意一定地域空间用 in，一类事物 范围内用 0f) a+最高级表示“非常”， the+最高级表示 “最”。 This is a most difficult question. This is the most difficult question. 比较要同类，在同一范围内，排除自身的方 法用 other，在不同的范围内，不用 other. Shanghai is larger than any other city in China.=Shanghai is the largest city in China. Shanghai is larger than any city in Inida. 1. My brother is two years _(old)than me. 2. Tom is as _(fat) as Jim. 3.- Is your sister _(young) than you? -Yes 4. Who is _(thin),you or Helen? Helen is. 5. Lucy is the_(good) student in our class. 6. Marys hair is as _(long) as Lucys. 7. Which is _ (big),the sun ,the moon or the earth? 8. Who is _ (tall),Tom or Sam? 9.Fangfang is not as _ (tall) as the other girls. 10.My friends are _(many) than _ (she). 练习：单选题 fat younger thinner best long the biggest taller tall more older hers 三 单项选择。 1.Alan is_ than Linda. A. tall B. taller C. tallest 2. -She is _ than her mother. -Her mother is also beautiful. A. beautiful B. beautifuler C. more beautiful D. the most beautiful 3. -Do you always get up as _ as you brother? -Not always. A. earliest B. earlier C. the earliest D.early 4. He is _more beautiful than I. A. too B. enough C. much D. very B C D C 5. This book is _ that one. A. as better as B. as good as C. as best as 6. The earth is_ the moon. -I also saw it on the newspaper. A. as 49 times big as B. 49 times as bigger as C. 49 times as big as D. as big as 49 times 7. -It looks like that he is as _ as you. -Oh, no. He is _ than I. A. tall, a little tall B. taller, a little tall C. tall, a little taller D. taller, a little taller 8.-Thanks for taking care of the garden, it is becoming _. -You are welcome. A. more beautiful and more B. more beautiful and more beautiful C. more and more beautiful B C C C 9. The box is _ heavy .I cant move it. A. much B. more C. enough D. too 10. Her brother is _ than she. A. seven year older B. seven year older C. seven years old D. seven years older 11. The_you stand,the _ you can see. A. high; far B. higher; farther C. highest; farthest D. more higher; more farther 12.You should study English hard, because its getting_ in our country . A. more and more important B. more important and more important C. importanter and importanter D. important and important D D B A 13. _you learn ,_ you will learn. A. harder, better B. the harder, the good C. the harder, the better 15. Who is _ student in your class? A. good B. better C. best D. the best C D 改错 1. Lesson 9 is more easier than Lesson 10. 2. My mother is younger than your. 3. He is one of longest boys in his class. 4. The boy doesnt draw much well. 5. Betty is the youngest on the three girls. 6. Mother is the busiest of my family. 7. You can jump very higher on the moon than on the earth. yours the longest very of in much Do some exercises 同义句转换 1. He is the tallest student in his class. He is _ _ _ _ student in his class. He is _ _ _ _ students in his class. 2. Peter draws well, Lilei draws better. Lilei draws _ of the two. taller than any other taller than the other better D D