预习：一、写出下列形容词和副词的比较级和最高级。fast _ _ wide _ _ easy _ _small_ _ large_ _ dirty_ _long _ _ rude _ _ busy_ _hot_ _ thin_ _ fat _ _few _ _ good_ _ little_ _badly_ _ far_ _ difficult_ _形容词和副词的原级 表示某人或物自身的情况时,用原级。基本句型是：主语(sb./sth) + 谓语动词 + (very/too/so/quite/rather) + 形容词/副词原级 +. 如： He is very old now. They ran quite fast. The weather looks rather bad.(天气看上去相当糟) / I am so happy!(我是如此的快乐) ： 表示两者之间没有差别时,使用句型：主语(第一个人物) + 谓语动词+ as + 形容词/副词原级+ as + 第二个人物 +. He is as excited as his younger sister. She rode her bike as slowly as an old lady. 3）表示第一个人比不上第二个人时,使用句型：主语(第一个人物)+谓语动词(否定式)+ as/so+形容词/副词原级+as+第二个人物+. 如： He is not so / as excited as his younger sister. Lily did not ride her bike so / as slowly as an old lady. They didnt pick so / as many apples as the farmers (did). 讲述两者有差异,第一个人物超过第二个人物时,用比较级。基本句型： 4)用表示倍数的词或其他程度副词做修饰语时，放在as的前面。This room is twice as big as that one.Your room is the same size as mine.5) 倍数+ as + adj. + as 倍数+ then + ofhis bridge is three times as long as that one.This bridge is three times the length of that one.Your room is twice as large as mine.Your room is twice the size of mine.练习：1.) i think the story is not so _ as that one. a. interesting b. interested c. more interesting d. most interesting2. the boy is not so _ (interesting) as his brother3.本书跟那本书一样有趣。this book is _ _ _ that one.形容词和副词的比较级2. 比较级用于两者或两部分间的比较。（1）两者相比（甲乙），用“比较级than”表示A+形容词比较级+than+ B Susan is happier than Jane. His brother is younger than me. Beijing is more beautiful than Osaka（2）数字+形容词比较级+than Im two years older than you. She is a head taller than me（3）表示“不如”，用“less原级than”结构e.g. the book is less difficult than that one. the film is less interesting than that one.（4）不与其他事物相比，表示本身程度的改变，用“比较级and比较级”结构，意思是“越来越” the weather is getting colder and colder. our country is becoming more and more beautiful.注意：修饰比较级的词有much, even, still, a little，far, a lot, a bit, much more来修饰，表示“得多”，“甚至”，表程度。e.g. today is much colder than yesterday.附加： 常见比较级五句型who / which + be +比较级 , a or b ? who is taller, tom or john?which is more expensive, a bicycle or a computer? + be + the 比较级 + of the two. (两个之中比较的那一个，包含在两个之中) tom is the taller of the two. = tom is taller than the other boy. much / a lot / even / far + 比较级 a compute is much more expensive than a bicycle. 计算机比自行车贵多了the+形容词比较级., the+形容词比较级., 表示 越. 就越.。 the more you study, the more you know. 你学的越多, 就知道的越多。 形容词比较级 + and + 形容词比较级 , 表示 越来越. 。 the computer is cheaper and cheaper. 练习：3). this book is_ that one, but_ than that one.a. as difficult as; expensive b. as more difficult as; more expensivec. as difficult as; more expensive d. more difficult as; as expensive4.) this box is_ that one. a. heavy than b. so heavy than c. heavier as d. as heavy as5）. our classroom is_ larger than _.a. more,theirs b. quite,their c. even,them d. much,theirs6. maths is more popular than_.a. any other subject b. all the subjects c. any subject d. other subject7. china is larger than _ in africa.a. any other country b. other countries c. the other country d. any country8. tom is stronger than _ in his class.a. any other boy b. any boys c. any boy d. other boy9. when spring comes, it gets_.a. warm and warm b. colder and colder c. warmer and warmer10. when spring comes the days get _ and nights _. a. short; long b. long; short c. longer; shorter d. shorter; longer11. _ he read the book, _ he got in it. a. the more; the more interesting b. the less; the more interesting c. the more; the more interested 12. i like_ one of the two books. a. the older b. oldest c. the oldest d. older13. which is_country, china or japan? a. the large b. the larger c. larger d. largest14. of the two cups, he bought_ . a.the smaller b. the smallest c. small d: smaller15. which do you like _, tea or coffee? a. well b. better c. best d. most16. this work is _ for me than for you. a. difficult b. most difficult c. much difficult d. more difficult17. which do you think tastes _, the chicken or the fish? a. good b. better c. best d. well.18.他对英语越来越感兴趣。he is becoming _ _ _ _ in english19.她的身体状况一天天好起来。he is getting _ _ _ every day20. _ children there are in family,_ their life will be. A. The less; the better B. The fewer; the better C. Fewer; richer D. More; poorer