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1、精选优质文档-倾情为你奉上课前准备：检查学生掌握单词情况（听写） 一、形容词、副词的比较级和最高级的构成规则1一般单音节词和少数以-er，-ow结尾的双音节词，比较级在后面加-er，最高级在后面加-est；（1）单音节词如：smallsmallersmallest shortshortershortest talltallertallest greatgreatergreatest（2）双音节词如：clevercleverercleverest narrownarrowernarrowest 2以不发音e结尾的单音节词，比较在原级后加-r，最高级在原级后加-st；如：largelargerla
2、rgest nicenicernicest ableablerablest3在重读闭音节（即：辅音元音辅音）中，先双写末尾的辅音字母，比较级加-er，最高级加-est；如：bigbiggerbiggest hothotterhottest fatfatterfattest4以“辅音字母y”结尾的双音节词， 把y改为i，比较级加-er，最高级加-est；如：easyeasiereasiest heavyheavierheaviest busybusierbusiest happyhappierhappiest5其他双音节词和多音节词，比较级在前面加more，最高级在前面加most；如：beaut
3、ifulmore beautifulmost beautifuldifferentmore differentmost different easilymore easilymost easily注意：（1）形容词最高级前通常必须用定冠词 the，副词最高级前可不用。例句： The Sahara is the biggest desert in the world. （2） 形容词most前面没有the，不表示最高级的含义，只表示非常。 It is a most important problem. =It is a very important problem. 6有少数形容词、副词的比较级
4、和最高级是不规则的，必须熟记。如：goodbetterbest wellbetterbestbadworseworst illworseworstoldolder/elderoldest/eldest many/muchmoremost littlelessleast far further/farther furthest/farthest词形变换。比较级 最高级large _ _fast _ _easy _ _wet _ _good _ _important _ _well _ _bad _ _many _ _little _ _far _ _strong _ _patient _ _sa
5、fe _ _expensive _ _ 二、形容词、副词的比较级和最高级的句子公式：比较级形容词物体A + am / are / is + 形比 + than + 物体B.I am taller than you.Pasta is more delicious than pizza.副词物体A + 行为动词 + 副比 + than + 物体B.Cheetahs run faster than goats.He studies better than me. 最高级1）物体A + am / are / is + the + 形最高级 + 比较范围（of + 人/物，in +地方）.I am th
6、e tallest in the class.Pasta is the most delicious food of the three.2）物体A + 行为动词 + 副词最高级 + 比较范围（of + 人/物，in + 地方）.Cheetahs run fastest in the world.He studies best of us. 1. She is _ than _ . A. busier / us B. busier / we C. more busy / us D. more busy / we2. Jane is _ than Betty. A. less taller B.
7、 less tallest C. less tall D. not as tall3. China is _ country in the world. A. the third largest B. the largest third C. the third large D. a third largest4. -Which is _ season in Beijing?-I think its autumn.A.good B.better C.best D.the best5- Which is_ , the sun, the moon or the earth?- Of course,
8、 the moon is.A.small B.smaller C.smallest D.the smallest6.The air in Beijing is getting much _ now than a few years ago.A. clean B. cleaner C. cleanest D. the cleanest7. Mobile phones are very popular now and they are _ than before.A. cheap B. cheaper C. cheapest D. the cheapest8I study English as_a
9、s my brother.A.hard B. harder C. hardest9. Which is _ , a bicycle or a computer?A. expensive B.more expensive C.the most expensive10. The Yellow River is one of _rivers in China. A long B longer C the longest11.She is the second _student in our class. A. tall B. taller C. tallest用括号里的词的适当形式填空。 1. To
10、m can jump _(high). He jumps _(high) than the other boys inhis class. 2. Janet sing _(well) in her class. She can sing _(well) than her music teacher, too. 3. My father is _(handsome). But my brother is _(handsome) than him. He is _(handsome) in my family. 4. I have _(many) books in my class. But my
11、 teacher has _(many) books than _(I). 5._(they) house is much _(old) than _(we). 三、形容词和副词比较级的用法1“A + be +形容词比较级 + than + B” 意思为“A比B更”。如：This tree is taller than that one. 这棵树比那棵树高。 注意： 在含有连词than的比较级中，前后的比较对象必须是同一范畴，即同类事物之间的比较。 在比较级前面使用much，表示程度程度“强得多”。 如：A watermelon is much bigger than an apple. ve
12、ry, quite一般只能修饰原级，不能修饰比较级。 2“比较级 + and + 比较级”或“more and more +原级”表示“越来越”如：It becomes warmer and warmer when spring comes. 春天来了，天气变得越来越暖和了。It is getting cooler and cooler.天气越来越凉爽。The wind became more and more heavily.风变得越来越大。Our school is becoming more and more beautiful. 我们的学校变得越来越美丽。3在含有or的选择疑问句中，如
13、果有两者供选择，前面的形容词要用比较级形式。如：Who is taller,Tim or Tom? 谁更高，Tim还是Tom?4. “the +比较级, the+比较级”，表示“越越”。The more money you make, the more you spend.钱你赚得越多，花得越多。The sooner，the better. 越快越好。5. 表示倍数的比较级用法：. A is times the size /height/length/width of B. 如：The new building is three times the height of the old one.
14、这座新楼比那座旧楼高三倍。(新楼是旧楼的四倍高). A is times as big /high/long/wide/large as B.如：Asia is four times as large as Europe.亚洲是欧洲的四倍大。(亚洲比欧洲大三倍). A is times larger /higher/longer/wider than B.如：Our school is twice bigger than yours.我们学校比你们学校大两倍。6.形容词、副词的最高级形式主要用来表示三者或三者以上人或事物的比较，表示“最”的意思。句子中有表示范围的词或短语。如：of the t
15、hree, in our class等等。如：He is the tallest in our class. 他在我们班里是最高的。7.否定词语+比较级，否定词语+ so as结构表示最高级含义。 Nothing is so easy as this. =Nothing is easier than this. =This is the easiest thing.8. 比较级与最高级的转换： Mike is the most intelligent in his class. Mike is more intelligent than any other student in his cla
16、ss注意：修饰比较级和最高级的词1）可修饰比较级的词.a bit, a little, rather, much, far, by far, many, a lot, lots, a great deal, any, still, even等。 . 还可以用表示倍数的词或度量名词作修饰语。 . 以上词(除by far)外，必须置于比较级形容词或副词的前面。 注意： 使用最高级要注意将主语包括在比较范围内。 (错) Tom is the tallest of his three brothers. (对) Tom is the tallest of the three brothers. 2)下
17、列词可修饰最高级：by far, far, much, mostly, almost。 This hat is nearly / almost the biggest. 注意： a. very可修饰最高级，但位置与much不同。 This is the very best. This is much the best. b. 序数词通常只修饰最高级。 Africa is the second largest continent. 选择题1. This box is_ that one. A. heavy than B. so heavy than C. heavier as D. as hea
18、vy as 2. When we speak to people, we should be . A. as polite as possible B. as polite as possibly C. as politely as possible D. as politely as possibly 3. This book is_ that one, but_ than that one.A. as difficult as; expensive B. as more difficult as; more expensive C. as difficult as; more expens
19、ive D. more difficult as; as expensive 4. I think the story is not so _ as that one. A. interesting B. interested C. more interesting D. most interesting 5. His father began to work_ he was seven years old. A. as old as B. as early as C. since D. while6.I think science is _ than Japanese. A. much im
20、portant B. important C. much more important D. more much important7.This pencil is_ than that one.A. longest B. long C. longer D. as long 8.My mother is no _ young.A. shorter B. longer C. little D. few 9.These children are _ this year than they were last year. A. more tall B. more taller C. very tal
21、ler D. much taller10.It was very hot yesterday, but it is_ today.A. even hotter B. more hotter C. much more hot D. much hot 四、总结与作业1.选择填空。1.Birds can fly _, eagles can fly_than birds. They fly _ in theworld. ( high, higher, highest )2. I am _ than my brother, but my little sister isthe _ of us. (fat
22、, fatter, fattest )3. Which can swim _, fish or sharks? ( well,better, best )4. The green book is a _ book, but the red oneis much _ than the green one. Its the _ book in the bookshop. (nice, nicer, nicest )5. Look at that boy, he is running _ (fast,faster).6. I think that book is _ (good, better) f
23、or you.7. The new library has _ (many, more) books thanthe old one.8. Sally is _ (tall, taller) than her cousin.9. Our school is much _ (large, larger) than yours.10. Look, Janet is jumping _ (high, higher) than Mike.2.汉译英。1.她比我漂亮。（pretty）_2.我学习比他们好。（well）_3.她是我们中间最漂亮的。（pretty）_4.我学习是全班上最好的。（well）_专心-专注-专业