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人教新目标版 八年级下册
Unit 7 What’s the highest mountain in the world.
Section A Grammar Focus-4c
Learning objectives
Knowledge objectives:
1. 熟练掌握以下词汇和短语
ocean; the Pacific Ocean; as...as; any other...
2. 熟练掌握以下句型
1. Did you know that China is one of the oldest countries in the world
2. No ocean is as big as the Pacific Ocean.
3. It's higher than any other mountain.
Skill objectives:
1. 复习本单元目标句型, 熟练掌握形容词和副词比较级和最高级的运用。
2. 能正确运用形容词副词的比较级和最高级进行事物间的比较，能用大数描述和谈论自然地理概述, 培养总结归纳的能力。
3. 通过4a和4b练习，进一步巩固知识。
Cultural awareness objectives:
鼓励学生仔细观察并善于发现总结规律。
Thinking quality objectives:
通过语法结构的学习,思考如何运用语法结构帮助我们提高英语的听、说、读、写的能力。
New words
Read and repeat.
ocean/ n/
n. 大海；海洋
the Pacific Ocean
/ p s f k n/
n. 太平洋
Warm up
Let’s watch a video.
Look and review.
Qomolangma
No mountain in the world is ________ Qomolangma.
It is 8848.86 meters _____.
lt is ________ mountain in the world.
It is ______ than any other mountain in the world.
high
higher
the highest
as high as
Look and review.
the Nile
No river in the world is ________ the Nile.
It is 6,671 kilometers _____.
lt is _________ river in the world.
It is ______ than any other river in the world.
long
longer
the longest
as long as
the Caspian Sea
Look and review.
No salt lake in the world is ________ the Caspian Sea.
It is 1025 meters _____.
lt is _________ salt lake in the world.
It is ______ than any other salt lake in the world.
deep
deeper
the deepest
as deep as
the Sahara
Look and review.
No desert in the world is ________ the Sahara.
It is 9600000 square kilometers _______.
lt is _________ desert in the world.
It is ______ than any other desert in the world.
in size
larger
the largest
as large as
Free talk
Peter is the tallest students in the class.
Peter is taller than any other student in the class
No student in the class is as tall as Peter.
Peter is much taller than ...
Mike is almost as tall as Peter.
He is one of the tallest students in the class.
Suppose Peter is the tallest studlent in the class.
You can say,
Grammar focus
Grammar Focus
Observe this chart and let’s read the sentences.
What’s the highest mountain in the world Qomolangma.
How high is Qomolangma It’s 8,848.86 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.
世界上最高的山是什么
珠穆朗玛峰。
珠穆朗玛峰有多高
它有8848.86米高。它比其他任何一座山都高。
世界上最深的盐水湖是哪个
里海是所有盐湖中最深的。
你知道中国是世界上最古老的国家之一吗
是的，我知道。它比美国古老得多。
Read the following sentences and find the comparatives and superlatives.
Grammar Focus
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.
此句型用比较级表达最高级含义
形容词和副词的原级,比较级,最高级
原级
Positive form
比较级Comparative form
最高级Superlative form
没有比较含义,“……”
两者间比较,“更……”
三者及三者以上比较,“最……”
注意：某些形容词和副词只用原级，如：perfect，excellent，dead等。
形容词和副词的比较级和最高级
大多数形容词和副词有三个等级：_____________________。比较级表示_________，用于__________的比较，说明“前者比后者更……”。形容词、副词的最高级用于_____________的人或事物之间的比较，常用_________来说明比较的范围。形容词最高级前要加_________，副词最高级前的the_______。
原级、比较级和最高级
“更……”
两者之间
三个或三个以上
of/in短语
定冠词the
可省略
比较级和最高级的变化规则
smart→smarter→smartest
tall→taller→tallest
high→higher→highest
short→shorter→shortest
slow→slower→slowest
small→smaller→smallest
1.一般在词尾直接加-er/-est
Can you think of more words
2. 以字母e结尾的词(去e)加-r/-st
wide→wider→widest
fine→finer→finest
brave→braver→bravest
large→larger→largest
late→later→latest
cute→cuter→cutest
Can you think of more words
thin→thinner→thinnest
fat→fatter→fattest
big→bigger→biggest
hot→hotter→hottest
red→redder→reddest
wet→wetter→wettest
Can you think of more words
funny→funnier
lazy→lazier
early→earlier
easy→easier
happy→happier
heavy→heavier
3. 重读闭音节词词尾只有一个辅音字母时，先双写该辅音字母，再加-er/-est。
4. 以“辅音字母+y”结尾的双音节词，改“y” 为 “i”，再加-er/-est。
Can you think of more words
beautiful→more/mostbeautiful
interesting→more/most interesting
hard-working→more/most hard-working
popular→more/most popular
5. 多音节词和部分双音节词,比较级前加more，最高级前加most。
Can you think of more words
good/well→better→best
bad/badly/ill→worse→worst
many/much→more→most
little→less→lest
old→older/elder→oldest/eldest
far→farther/further→farthest/furthest
特殊不规则变化
形容词和副词的原级,比较级,最高级的用法
原级
A baby panda is as cute as a baby elephant.
He studies as hard as his brother.
“as+形容词/副词原级+as”意为 “和……一样”
用于肯定句
形容词和副词的原级,比较级,最高级的用法
原级
This mountain is not as/so high as that one.
He cannot run as/so fast as Jack.
“not as/so+形容词/副词原级+as”意为 “和…不一样”
用于否定句
形容词和副词的原级,比较级,最高级的用法
比较级
This mountain is much higher than that one.
My mom got up earlier than me this morning.
“比较级+than…”意为 “比……更……一些”
Bajie, stop eating!
The more you eat,
the heavier you will be.
I just love the delicious food. I don't agree with you!
The more I eat,
The stronger I will be.
The+比较级…,
The+比较级…
意为“越……，越……”
形容词和副词的原级,比较级,最高级的用法
比较级
形容词和副词的原级,比较级,最高级的用法
比较级
The weather is getting colder and colder. We should wear more!
You are right, Wujing. The task will be more and more difficult, too.
“比较级 + and + 比较级” 或 “more and more+ 形容词/副词原级”，表示 “越来越……”
形容词和副词的原级,比较级,最高级的用法
比较级
The task is much more difficult.
The task is a lot more difficult.
The task is far more difficult.
Be optimistic(乐观的)! The task is just a little more difficult.
当表示一方超过另一方的“程度”时，可以用much, a lot, a little, a bit, even, far等来修饰形容词比较级。注意：比较级不能用very, so, too等修饰。
形容词和副词的原级,比较级,最高级的用法
比较级
My mom is taller than my dad.
___________________________
Who is taller, My mom or my dad
The horse walks faster than the turtle.
_________________________
Which animal walks faster
Who/Which+……+比较级, A or B
形容词和副词的原级,比较级,最高级的用法
最高级
主+be+形容词最高级+名词+范围。
主+动词或动词短语+副词最高级(the可省略)+范围。
The Yangtze River is the longest river in China.
She jumps (the) farthest of the three.
最高级常与介词in或of短语连用表范围
最高级
“one of the+形容词最高级+可数名词复数”表示“最......之一”。
形容词和副词的原级,比较级,最高级的用法
Pandas are one of the most popular animals in the world.
The Yellow River is one of the longest rivers in the world.
最高级
Who/Which+……+最高级, A,B or C
形容词和副词的原级,比较级,最高级的用法
dog
horse
cheetah[ t i t ]
—Which animals runs _________, dogs, horses or cheetahs (fast)
the fastest
—The cheetahs.
形容词和副词的原级,比较级,最高级的用法
最高级
the + 序数词 + 最高级 + 可数名词单数 + in/of 短语该结构意为“……在……中是第几……的……”（从第二开始）。
Russia is __________ country in the world. (large)
Canada is ________________ country in the world. (large)
China is ______________ country in the world. (large)
the largest
the second largest
the third largest
形容词和副词的原级,比较级,最高级的用法
比较级表达最高级
My father is taller than ______________ in my family.
My father is the tallest one in my family.
My father is taller than _______________ in my family.
“比较级+than any other+可数名词单数”=“比较级+than the other+可数名词复数”表示“比其他任何……都……”, 表示最高级含义， 可与表示最高级的句子进行转换。
any other member
the other members
4a
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
longest
longer
high
popular
big
older
much
太平洋
n. 大海，海洋
Make comparisons according to the table.
the Nile River the Amazon River the Yangtze River the Yellow River
6,671 km 6,480 km 6,300 km 5,464 km
The Nile River is the longest river in the world.
No river in the world is as long as the Nile River.
The Amazon River is one of the longest rivers in the world.
The Amazon River is a little longer than the Yangtze River.
The Nile River is much longer than the Yellow River.
Write two comparisons about two topics. Write true facts.
e.g. Two rivers: the Yangtze River and the Amazon River
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.
4b
Two cities: ________________ and _______________
________________________________________________
________________________________________________
________________________________________________
Two animals: ________________ and _______________
________________________________________________
________________________________________________
________________________________________________
Singapore
Kuala Lumpur
Kuala Lumpur is as modern as Singapore.
Singapore is bigger than Kuala Lumpur and has a larger population than Kuala Lumper.
Rabbit
Snail
A rabbit is bigger than a snail.
A snail is a lot smaller than a rabbit, and it runs much slower than a rabbit.
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 busiest subway station in our city
What is the largest shopping mall in our city
Which is the biggest park in our city
Which is the longest road in our city
Which place is the best for our school trip
Our school is going on a school trip in the city. Which is the best place to go to Can you give some advice and why Work in groups of 5 and report to the class. Remember to use comparisons.
Example:
We think ______ is the best place for us to go on a school trip. Of all the places, it is the ________. And we can also ______ . So we all think it is a good idea to visit________________.
Homework
1. Do the exercises in students’ book.
2. Read and recite the words and phrases in Section A (GF-4c).
3. Preview the passage in Section B 1a-1d.
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