unit 7 What's the highest mountain in the world?第三课时　Section A (Grammar Focus－4c) 课件（20张PPT）

(共20张PPT)
Unit 7　What's the highest mountain in the world
Section A (Grammar Focus－4c)
单词展示
ocean
n. 大海；海洋
the Pacific Ocean
n. 太平洋
生成新知
Grammar Focus
What’s the highest
mountain in the world Qomolangma.
How high is Qomolangma It’s 8,844.43 meters high. It’s higher than any other mountain.
Which is the deepest salt lake in the world The Caspian Sea is the deepest of all the salt lakes.
Did you know that China is one of the oldest countries in the world Yes, I did. It’s much older than the US.
形容词、副词的比较级和最高级
概述：
英语中的形容词和副词常用三种形式来表达事物的等级差别，即原级、比较级和最高级。
比较级主要用于两者之间作比较。
最高级主要用于三者或三者以上进行比较。
1．形容词比较级的句型结构
(1)形容词的比较级＋than＋比较对象。前后相比较的两个事物一定要属于同类，而且作比较时，一定要避免自身与自身相比。表示一个范围内两事物比较，用“比较级＋than＋any other＋单数名词”。
如：He is more careful than any other student in his
class.
他比班上任何一个学生都认真。
(2)as…as…意为“与……一样……”，其否定形式为“not so/as…as…”，意为“不及；不与……一样……”。
它们也是一种表达比较的形式，注意as与as之间要用形容词或副词的原级。
2．比较级的特殊句型
the＋比较级，the＋比较级“越……越……” The busier we are，the unhappier we will be.
比较级＋and＋比较级“越来越……” Our country is getting stronger and stronger.
比较级前可以用much，a little，a bit，even等修饰。
如：The shoes are a little bigger for me.
对我来说，这双鞋有点儿大。
【注意】当比较级后有of the two…之类的短语时，比较级前要加定冠词the。
在选择疑问句中两者进行比较，常用句型：
Which/When/Who＋be＋形容词比较级，A or B
3．形容词最高级的句型结构
4．最高级的特殊句型
疑问词＋be＋the＋最高级 Which is the biggest，the sun，the moon or the earth？
the＋序数词＋最高级“第几……” The Yellow River is the second longest river in China.
one of the＋最高级＋复数名词“最……之一” Shanghai is one of the biggest cities in the world.
“主语＋be＋the＋形容词最高级＋in/of＋范围”表示“在某范围内最……”。
(1)形容词最高级前通常要加定冠词the。但前面若有物主代词、指示代词或名词所有格等修饰时，不能用定冠词the。
【注意】
(2)形容词最高级常与介词in或of引导的短语连用，与in连用意为“在……内”，表示“在某范围内”，不一定是同类；与of连用表示“属性”，介词后的名词或代词与句中的主语是同一类人或物，意为“在某一类中”。
4a
Fill in the blanks with the correct forms of the words in the box.
big much popular long old high
1. The Amazon River is one of the _______ rivers
in the world. It’s a little _______ than the
Yangtze River.
longest
longer
big much popular long old high
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.
high
popular
big
older
much
4b
Write two comparisons about two topics. Write true facts.
Two rivers: ________________ and ________________
__________________________________________________________________________________________________________________________________________
the Yangtze River
the Amazon River
The Amazon is longer than the Yangtze, but the Yangtze is
The Yangtze River is almost as long as the Amazon River.
the longest river in China.
Two cities: ___________ and ___________
1. ___________________________________________.
2. ___________________________________________
____________________________________ .
Shanghai
Shanghai is as modern as Sydney
Shanghai is much smaller than Sydney. Sydney is
Sydney
almost 2 times as big as Shanghai
Two animals: _____________ and _________
1. _______________________________.
2. ___________________________________________
_______________________________ .
a fish
A shark is bigger than a fish.
A fish is smaller than a shark. A shark eats
a shark
more than a fish.
4c
Write five questions using comparisons. Then ask your partner your questions.
1. ______________________________________
2. ______________________________________
3. ______________________________________
4. ______________________________________
5. ______________________________________
What is the highest building in our city
What is the biggest supermarket in our city
Who is the tallest student in our class
Who is the shortest student in our class
Who sings the best in our class
随堂练习
I.用括号内所给单词的正确形式填空。
1. He is happy with his _____________ (achieve).
2. The _________ (force) of rainstorm made the windows broken.
achievement
forces
3. After she worked hard at it for three hours, she ___________ (successful) in solving the problem.
4. Everyone should drive more carefully in the _________ (freeze) weather.
succeeded
freezing
II.单项选择。
(　 　)1.His books are ______more than mine.
A．many time　　　 B．more time
C．some time D．many times
(　 　)2.I know ______about Shenzhen than you，so tell me some，please.
A．little B．Some C．much D．less
D
D
(　 　)3.The Great Wall is more than ______．
A．6，000 kilometer long
B．6，000 kilometers long
C．6，000 kilometers long
D．6，000 kilometer longer
(　 　)4.What bad weather! The radio says it will be even ______ later on.
A．bad B．badly
C．worse D．worst
B
C