资源简介

(共22张PPT)
Section A Grammar Focus-4c
Unit 5
What’s the highest mountain in the world
Geographical facts 地理事实
What is the biggest ocean
最大的海洋：太平洋（1,813,440,00平方公里）
What is the smallest ocean
最小的海洋：北冰洋（14,750,000平方公里）
What is the biggest continent (大洲)
最大的大洲：亚洲（44,579,000平方公里）
Geographical facts 地理事实
What is the biggest lake
What is the deepest lake
What is the biggest desert
最大的湖泊：里海（亚洲、欧洲）386400平方公里
最深的湖泊（蓄水最多）：贝加尔湖（俄罗斯）1637米
最大的沙漠：撒哈拉沙漠（非洲）9，200,000平方公里
It is as big as China in size.
China has a long history of over 5,000 years old.
It is one of the oldest countries in the world.
Know more about China.
How old is China
How about the US
It's only about 300 years.
We have a much longer history.
Find out the comparatives and superlatives.
Grammar Focus
Rule1：形容词最高级前必须加定冠词the，句末常跟in/of短语表示范围。
Rule2：比较级结构可以表示最高级含义
比较级+any other+可数名词单数
Rule3:much 、a little 、a lot可以修饰比较级,表示比较程度
形容词和副词的比较级和最高级
大多数形容词和副词都有三个级。
原级: 常用结构as ... as... 像……一样
Zhang Hong is as tall as Tom.
张红和汤姆一样高。
2) 比较级 (用于两者之间的比较)
常用结构：形容词比较级＋than ...
He is taller than I.
他比我高。
3) 最高级(用于三者或三者以上的比较)，
常用结构:
the + 形容词的最高级＋of / in ...
He is the tallest of the three.
他是这三个人中最高的。
He is the funniest in his class.
他是他们班最有趣的。
形容词、副词比较级和最高级规则变化和不规则变化。
规则变化
1) 一般情况下，单音节或双音节的形容词
（或副词）比较级＋er ， 最高级＋est
如：
clever－cleverer－cleverest
few－fewer－fewest
small－smaller－smallest等。
2) 以e结尾的词，比较级＋r，最高级＋st 即可。 如：
nice－nicer－nicest cute－cuter－cutest large－larger－largest
3) 以辅音字母＋y结尾的变y为i＋er或est
如: easy－easier－easiest
happy－happier－happiest
再如：early, busy, heavy, dirty, lazy也如此。
4) 元音+辅音（重读）双写＋er 或 est
fat－fatter－fattest
2. thin－thinner－thinnest
3. hot－hotter－hottest
4. red－redder－reddest
5. wet－wetter－wettest
6. big－bigger－biggest
5) 多音节和部分双音节的词＋more构成比较级，＋the most构成最高级。如：
beautiful－ more beautiful－the most beautiful
又如: delicious, popular, important, interesting, expensive, creative
a) 规则变化：
careful－more careful－the most careful
useful－more useful－the most useful
b) 不规则变化：
good－better－best well－better－best
bad－worse － worst
many, much－more－most
far－farther－farthest (距离远)
far－further－furthest (程度深)
c)“one of + the + 形容词的最高级 + 复数名词”，意为“最……之一”。如：
Miss Wang is one of the most popular teachers in our school.
1. The Amazon River is one of the _________ rivers in the world.
It’s a little ________ than the Yangtze River.
2. Qomolangma is 8,844.43 meters _______. It’s one of the most
__________ places for serious mountain climbers.
3. No ocean in the world is as ________ as the Pacific Ocean.
4. Although Japan is _______ than Canada, it is ________ smaller.
big
much
popular
long
old
high
longest
longer
high
popular
big
older
much
太平洋
4a
Fill in the blanks with the correct forms of the words in the box.
4b
e.g. Two rivers: the Yangtze River and the Amazon River
Write two comparisons about two topics. Write true facts.
The Yangtze River is almost as long as the Amazon River.
The Amazon is longer than the Yangtze, but the Yangtze is the longest river in China.
Two cities: _________ and ___________
1. ___________________________________________.
2. ___________________________________________
____________________________________ .
Shanghai Sydney
Shanghai is as modern as Sydney
Shanghai is much smaller than Sydney./Sydney is
much larger than Shanghai
modern area:6340.5 sq km
modern area:1,2368.193 sq km
Two animals: ___________ and ____________
1. _______________________________.
2. _______________________________________.
An elephant is taller than a panda
an elephant
a panda
An elephant is much heavier than a panda
is 150 cm tall weighs 100 kilos
is 350 cm tall
weighs 5,000 kilos
4c
1. ________________________________________________________
2. ________________________________________________________
3. ________________________________________________________
4. ________________________________________________________
5. ________________________________________________________
What is the highest building in our city
What is the busiest road in our city
What is the largest shopping mall in our city
Which is the biggest park in our city
Which is the most expensive clothes store in our city
Write five questions using comparisons. Then ask your partner your questions.
1. It is _____ for me to follow the American guests because I am good at
English.
A. bad B. easy C. hard D. right
2. If you talk loudly in the public library, other people will _____ you .
A. be different from B. be angry with
C. be good for D. be full of
单项选择
Exercises
B
B
3. In the English class, you should read _____ to practice your spoken English.
A. loudly B. big C. alone D. lonely
4. Lanzhou is the only capital city that the Yellow River passes through, the
second _____ river in china.
A. longer B. longest C. shorter D. shortest
Exercises
B
B
用所给的词的适当形式填空：
1. This coat is _______ (expensive) than that one.
2. Nancy joins (few) clubs than I.
3. Miss Gao sings as ________(good) as Miss Yang.(同义句)
4. Mary is _____ (good) at math than her desk-mate.
5. The (old) of the two men is my uncle.
6. Who runs (fast), Lucy, Lily or Mary
7. The Yellow River is one of ___________ (long) rivers in China.
8. I am a little taller than . And my hair is longer than ____ .(you)
9. She is ______ in this _______ film. (interest)
more expensive
fewer
well
better
older
fastest
the longest
you
yours
interested
interesting
Exercises
课 堂 小 结
比较级
比较级的定义
变化规则及特殊形式
哪些词才能修饰比较级
the+比较级，the+比较级的含义
02
01
Homework
.Write five questions using comparisons and then ask your partner your questions.(必做)
Search more information about the city you’d like to trave most and make a card like this. Then share your card with your partners.(选做)

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