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：small→smaller→smallest short→shorter→shortest
tall→taller→tallest great→greater→greatest
（2）双音节词
如：clever→cleverer→cleverest narrowmaintain名词→narrower→narrowest
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：large→larger→largest nice旅游常用英语口语→性感英文nicer→nicest able→ablermiche→ablest
3．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：big→bigger→biggest hot→hotter→hottest fat→fatter→fattest
4．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：easy→easier→easiest heavy→heavier→heaviest
busy→busier→busiest happy→happier→2012高考英语happiest
5．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：beautiful→more beautiful→most beautiful
different→more different→most different
easily→more easily→most 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 dert 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、副词的比较级和最高级是不规则的，必须熟记。
如：good→better→best well→better→best
bad→wor→worst ill→wor→worst
old→older/elder→oldest/eldest
many/much→more→most little→less→least
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 _________________ ___________________
safe _________________ ___________________
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.
过来的英文Cheetahs run faster than goats.
He studies better than me.
最高级
1）物体A + am / are / is + the + 成人网址推荐形最高级 + 比较范围（of + 人/物，in +地方）.
I am the 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 / we
2. Jane is ________ than Betty.
A. less taller B. less tallest C. less tall D. not as tall
3. China is ________ country in the world.
A. the third largest B. the largest third C. the third large D. a third largest
4. -Which is ____ ason in Beijing?
-I think it's autumn.
A.good B.better C.best D.the best
5．- Which is__________ , the sun, the moon or the earth?
-- Of cour, the moon is.
A.small B.smaller C.smallest D.the smallest
6.The air in Beijing is getting much _____ now than a few years ago.
A. clean B. cleaner C. cleanest D. the cleanest
7. Mobile phones are very popular now and they are _____ than before.
A. cheap B. cheaper C. cheapest D. the cheapest
8．I study English as_______as my brother.
A.hard B. harder C. hardest
9. Which is _____ , a bicycle or a computer?
A. expensive B.more expensive C.the most expensive
10. The Yellow River is one of ______rivers in China.
A long B longer C the longest
11.She is the cond _______student in our class.
A. tall B. taller C. tallest
用括号里的词的适当形式填空。
1. Tom can jump _______(high). He jumps _______(high) than the other boys in
his 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 teacher has _____(many) books than ____(I).
5.______(they) hou is much ______(old) than ______(we).
三、形容词和副词比较级的用法
领队英语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：
① 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。
②在比较级前面使用craziermuch，表示程度程度“强得多”。
如：A watermelon is much bigger than an apple.
③ very, quite多少钱英文一般只能修饰原级，不能修饰比较级。
