Unit 7 What's the highest mountain in the world? Section A Grammar Focus~4c课件(共20张PPT) 人教版八年级下册

(共20张PPT)
Unit 7
What's the highest mountain in the world
Section A (Grammar Focus~4c)
Revision
Answer the questions.
China is one of the oldest countries. It’s over 5,000 years old.
How old is China
What’s the population of China
China has the largest population in the world. It’s about 1.3 billion.
The Yangtze River. It’s also the longest in Asia.
What’s the longest river
Does China have the largest area in the world
No, it’s the third largest county in the world.
能记住形容词和副词的比较级和最高级的规则变化和不规则变化。
1
能运用比较级和最高级的几个句型。
2
分组朗读并观察下列句子。
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.
1 组
2 组
3 组
4 组
Divide the whole class into 4 groups and
each group discusses one question.
Group 1：形容词、副词由原级变为比较级和最高级的一般
规则是什么？
Group 2：形容词、副词由原级变为比较级和最高级的不规
则变化有哪些？
Group 3：比较级有哪些句型？
Group 4：最高级有哪些句型？
目标一: 能记住形容词和副词的比较级和最高级的规则变化和不规则变化
讨论时间过后，第一、二组派代表依次回答下面的问题，并欢迎其他组同学做补充。
Activity 1
Group 1：形容词、副词由原级变为比较级和最高级的一般
规则是什么？
Group 2：形容词、副词由原级变为比较级和最高级的不规
则变化有哪些？
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的规则变化
1) 一般情况下，比较级词尾＋er，最高级词尾＋est。如：
high—higher—highest deep—deeper—deepest
形容词、副词的比较级和最高级的规则变化
2) 以e结尾的词，比较级词尾＋r，最高级词尾＋st。如：
cute—cuter—cutest large—larger—largest
3) 以辅音字母＋y结尾，变y为 i，比较级词尾＋er，最高级词尾est。如：
easy—easier—easiest happy—happier—happiest
4) 重读闭音节，单辅音结尾，双写词尾辅音字母＋er或est。如：
fat—fatter—fattest thin—thinner—thinnest
hot—hotter—hottest big—bigger—biggest
形容词、副词的比较级和最高级的规则变化
5) 多音节和部分双音节的词，比较级、最高级分别是在原级前＋more和the most 。如：
beautiful—more beautiful—the most beautiful
careful—more careful—the most careful
包括少数单音节词：
pleased—more pleased—the most pleased
tired—more tired—the most tired
形容词、副词的比较级和最高级的不规则变化
原级 比较级 最高级
good/well好的 better更好的 best最好的
bad差的，ill坏的 worse更差的；更坏的 worst最差的；
最坏的
many/much多的 more更多的 most最多的
little少的 less更少的 least最少的
形容词、副词的比较级和最高级的不规则变化
原级 比较级 最高级
old年老的；古老的 older较老的；较旧的 oldest最旧的；最年长的
elder年长的 eldest最年长的
far远的 farther（指距离）更远的 farthest最远的
further（指距离和抽象概念）较深远的 furthest（指距离和抽象概念）最深远的
Activity 2
Practice
4b
Fill in the blanks with the correct forms of the words in the box.
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
much
longest
longer
high
popular
big
older
注意比较级、最高级和原级的标志词或短语，它们会帮助你判断。
The Amazon River is a little longer than the Yangtze River.
此处a little修饰形容词的比较级，表示程度。
此外修饰形容词比较级的词还有much, far, a lot, a bit, even, still等。
例如：
(1)The pants are even more expensive.这条裤子更贵。
(2)I can type much faster than I can write by hand.
我用手打字比用手写字快得多。
目标二: 能运用比较级和最高级的几个句型
Activity 1
请第三、四组派代表回答下列问题，并欢迎其他组同学做补充。
Group 3：比较级有哪些句型？
Group 4：最高级有哪些句型？
比较级的句型 例句
(1)双方比较，表示一方超过另一方时，用“比较级+than”结构 China is larger than Italy.
中国比意大利大。
(2)用于“less+原级+than”（注意此结构不用于单音节词） The book is less interesting than that one.
这本书不如那本书有趣。
(3)倍数+比较级+than The box is three times bigger than that one. 这个箱子是那个的三倍大。
比较级的句型 例句
(4)“比较级+and+比较级”表示“越来越……” Our country is becoming stronger and stronger.
我们的国家正变得越来越强大。
(5)“the+比较级……，the+比较级……”表示“越……，就越……” The more, the better.
多多益善。
(6)the+比较级+of the two+名词复数 The taller of the two boys is my brother. 两个男孩中，较高的那一个是我的哥哥。
最高级的句型 例句
(1)the+形容词最高级+名词+表示范围的短语或从句 Spring is the best season of the year.
春天是一年中最好的季节。
(2)“one of the+最高级+复数名词”表示“最……之一” Kobe is one of the best basketball players in NBA.
科比是NBA最好的篮球运动员之一。
4b
Write two comparisons about two topics. Write true facts.
Activity 2
Two rivers: _________________ and _________________
__________________________________________________________________________________________________________________________________________________
the Yangtze River
the Amazon River
The Yangtze River is almost as long as the Amazon River.
The Amazon is longer than the Yangtze, but the Yangtze River is the longest river in China.
Two cities: _________________ and _________________
1.__________________________________________________________________
2.__________________________________________________________________
Singapore
Shanghai
Shanghai is as modern as Singapore.
Shanghai is bigger than Singapore and has a larger population than Singapore.
Two animals: _______________ and _______________
1.__________________________________________________________2.__________________________________________________________
Monkey
Tiger
A tiger is bigger than a monkey.
A monkey is smaller than a tiger, but it climbs a tree faster than a tiger.
Activity 3
4c
Pair work
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 busiest subway station in our city
What is the largest shopping mall in our city
What is the biggest park in our city
What is the longest road in our city
What is the highest building in our city
It’s ...
学习目标
通过本堂课的学习，你学到了什么？
能运用比较级和最高级的几个句型。
1
能记住形容词和副词的比较级和最高级的规则变化和不规则变化。
2