人教版英语八年级下册Unit7What’sthehighestmountainintheworldS ectionA1a-2c课件（28张）

(共28张PPT)
Unit 7
What’s the highest mountain in the world
Section A 1a-2c
珠穆朗玛峰是世界海拔最高的山峰，高度为8844.43米。
Qomolangma
World Record
Name
Qomolangma
Height
8,844.43 meters high
Where
In China
What’s the highest mountain in the world
the Caspian Sea
里海虽称海，但却是一个巨大的内陆咸水湖，是世界上最大的湖泊。
World Record
Name
Caspian Sea
Depth
1,025 meters deep
Where
Between Asia and Europe
What’s the deepest salt lake in the world
the Nile
尼罗河长6671千米，是世界上最长的河流。
World Record
Who
The River Nile
What
6,671 kilometers long
Where
In Africa
What’s the longest river in the world
the Sahara
撒哈拉沙漠形成于约250万年前，是世界上最大的沙质荒漠。
World Record
Name
The Sahara Desert
Size
9,600,000 square kilometers
Where
In North Africa
What’s the largest hot desert in the world
Can you read these large numbers
hundred
百
thousand
千
million
百万
billion
十亿
trillion
万亿/兆
9,600,000
1,025
6,671
8,844.43
nine million six hundred thousand
one thousand and twenty-five
six thousand six hundred and seventy-one
eight thousand eight hundred and forty-four point four three
[ b lj n]
[ m lj n]
[ tr lj n]
[ θa znd]
[ h ndr d]
844
eight hundred and forty-four
Read large numbers
one thousand
one thousand and twenty-five
six hundred thousand
one million
1,000
1,025
600,000
1,000,000
169,800,450
million thousand
one hundred and sixty-nine million
Read large numbers
eight hundred thousand
four hundred and fifty
The Sahara 9,600,000 square kilometers in size
The Caspian 1,025 meters deep
The Nile 6,671 kilometers long
(Nine million six hundred thousand)
(one thousand and twenty-five)
(six thousand six hundred and seventy-one)
Read large numbers
0 . 1
3 . 14
4 . 43
zero point one
three point one four
four point four three
Qomolangma 8,844.43 meters high
point
(eight thousand eight hundred and forty-four point four three)
Read small numbers
Try to answer questions
表示长、宽、高时常用句型：基数词 + 单位词（meter, foot, inch, kilo等）+ 形容词（ long, wide, high, tall）
in size 在尺寸上；在大小方面
与in size结构类似的还有：
in height 在高度上
in weight 在重量上
1b Listen and complete the sentences.
1. Qomolangma is ______ than any other mountain in the world.
2. The Sahara is ____________ desert in the world.
3. The Caspian Sea is ____________ of all the salt lakes.
4. The Nile is _________ river in the world.
higher
the biggest
the deepest
the longest
the highest mountain
bigger than any other desert
形容词的最高级及比较级表达最高级含义
最高级：the+ 形容词/副词+ est ...+in/of
Qomolangma is the highest mountain /higher than any other mountain in the world.
The Nile is the longest river /higher than any other river in the world.
The Sahara is the biggest desert / in the world.
The Caspian Sea is /deeper than any other salt lake in the world.
bigger than any other desert
the deepest salt lake
比较级+than any other+可数名词单数
“……比其他任何一个……都……”，指
同一范围内的比较，表达最高级的意义。
比较级+ than any +可数名词单数
“……比任何一个……都……”，指不
在同一范围内进行比较。
Practice in pairs like this:
A: What is the highest mountain in the world
B: Qomolangma.
A: How high is it
B: It is 8,844.43 meters high.
1c Use the information in 1a &1b to make conversations.
Practice in pairs:
A: What is the ... in the world
B: ...
A: How ... is it
B: It is ...high/deep/in size...
1,025 meters deep
9,600,000 km in size
8,844.43 meters high
6,671 kilometers long
How high/ long/ deep/ big is ...
How much do you know about China
China has the biggest population in the world.
It’s a lot bigger than the population of the United States.
Population (as of Saturday, April 4, 2020)
China 1,410,408,308
The United States 330,536,464
Canada 37,662,126
China is one of the oldest countries in the world.
It’s much older than the United States.
History
China Over 5,000 years old
The United States Not even 300 years old
one of+形容词最高级+名词复数
表示...之一
How much do you know about China
Listen and number the facts[1-4]in the order you hear them.
__The Yangtze River is about _____ kilometers long and the Yellow River is ______ kilometers long.
__China has the biggest population in the world. It’s a lot bigger than the population of the US.
__China is over _____ years old. It has a much longer history than the US. The US is not even ___ years old.
__China is almost as big as the US, and it is the biggest country in Asia.
4
2
1
3
2a
Listen again and fill in the blanks in 2a with the numbers
in the box.
4 The Yangtze River is about _______ kilometers long and the Yellow River is ______ kilometers long.
2 China has the biggest population in the world. It’s a lot bigger than the population of the US.
1 China is over ______ years old. It has a much longer history than the US. The US is not even _____ years old.
3 China is almost as big as the US, and it is the biggest country in Asia.
6,300
5,464
5,000
300
6,300 5,000 5,464 300
2b
China is a great country.
For population, it has... in the world. It is a lot/ much ...than...
It is ... in size. It is ...than....
As for history, it is one of .... It is much older than...
I love my country.
Can you introduce China now
谈论物体的
宽度
深度
高度
长度
tall/high
deep
long
wide
—It's + 数量+high/tall/long/wide/deep.
1. —How high/tall/long/wide/deep...+ is + 主语
2. 数词+ square kilometer(s)
数词+ square meter(s)
in size
Summary
英语表示“有多长（宽，高……）”时，一般将_____和__________ 放在表示长宽高的形容词___。
数词
数量单位
前
1.形容词的最高级及比较级表达最高级含义：
the+ 形容词/副词最高级 ...+in/of = 比较级+ than any other + 单数n.
Qomolangma is higher than any other mountain in the world.=Qomolangma is the highest mountain in the world.
The Sahara is bigger than any other desert in the world. =The Sahara is the biggest desert in the world.
Summary
4. 表示长、宽、高时常用句型：
基数词 + 单位词（meter, foot, inch, kilo等）+ 形容词（ long, wide, high, tall）
5. Read numbers.
2. one of+形容词最高级+名词复数 : 表示...之一
China is one of the oldest countries in the world.
3. much/ a lot +形容词比较级+ than...
China is much/ a lot older than the United States.
比较级和最高级变化规则
Revision
单音节词和部分双音节词 一般在词尾加-er/-est tall-taller-tallest
high-higher-highest
以字母e结尾的词加-r/-st fine-finer-finest
wide-wider-widest
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 hot-hotter-hottest
big-bigger-biggest
以“辅音字母+y”结尾的双音节词，变“y” 为 “i”，再加-er/-est lazy-lazier-laziest
happy-happier-happiest
多音节词和部分双音节词在其前面加more/most (注意：形容词最高级前要加the) interesting-more /most interesting
popular-more/most popular
原级 比较级 最高级
good/well better best
bad/ill worse worst
many/much more most
little less least
far farther further farthest furthest
old older elder oldest eldest
比较级和最高级不规则变化