资源简介

(共72张PPT)
Look and share
How do they make you feel
They make me feel amazed and excited.
Unit4: The Wonders of Nature
第1-3课时: Section A(1a - 4d)
八下英语RJ
What is amazing about nature
Look and share
1. Do you know the name of the waterfall in the photo
2. What do you think is special about it
Yes. It’s Victoria Falls. (维多利亚瀑布)
I think it is very wide and tall,
and it’s one of the largest waterfalls in the world.
Look and share
3. What other natural wonders do you know
长江是中国、亚洲第一大河，全球第三长河
贝加尔湖是世界第一深湖、亚欧大陆最大的淡水湖
大堡礁是世界最大最长的珊瑚礁群,有2900个大小珊瑚礁岛，自然景观非常特殊
Yangtze River
Lake Baikal
Great Barrier Reef
desert 沙漠
snub-nosed monkeys 金丝猴
Yunnan stone forest
rime 雾凇
polar lights 极光
Yellow River Stone Forest
Match the places with the pictures.
1a
Pre-listening
Nile River Angel Falls Mount Qomolangma
Dead Sea Sahara Desert Mariana Trench
F
A
D
C
E
B
安赫尔瀑布
马里亚纳海沟
死海
珠穆朗玛峰
撒哈拉沙漠
尼罗河
What is amazing about these places
Pre-listening
Angel Falls
安赫尔瀑布位于委内瑞拉玻利瓦尔州圭亚那高原的卡罗尼河支流丘伦河上，是世界落差最大瀑布 。丘伦河水从平顶高原奥扬特普伊山直流而下而形成瀑布，分为两级，总落差 979米，以离丘伦河谷地 172 米的分结晶岩平台为界，其上为长的一级，高达 807 米。
Mariana Trench
马里亚纳海沟全长 2550 千米，为弧形，平均宽 70 千米。据估计这条海沟已形成 6000 万年。其最深处的地方达 6~11 千米，是已知的海洋最深处。2020年11月10日8时12分，中国“奋斗者”号载人潜水器在马里亚纳海沟成功坐底，坐底深度 10909 米。
Pre-listening
Dead Sea
死海是世界上最低的湖泊，也是地球上盐分居第三位的水体。截至2019年，死海表面积为 605 平方千米。 死海的湖岸是地球上已露出陆地的最低点，湖面海拔 -430.5 米。湖最深处 380.29 米，最深处湖床海拔 -800.112 米，有“世界的肚脐”之称。
Mount Qomolangma
珠穆朗玛峰简称珠峰，岩面高程 8844.43 米， 雪面高程 8848.86 米， 是喜马拉雅山脉中的主峰。由于亚欧板块和印度板块边缘的冲撞挤压，使喜马拉雅山地区猛烈抬升，据测算，平均每 一万年大约升高 20—30 米，直至如今，喜马拉雅山区仍处在不断上升之中，每 100 年上升 7 厘米。
Pre-listening
Sahara Desert
Nile River
撒哈拉沙漠位于非洲大陆北部，是世界上最大的沙漠。它西起大西洋沿岸，向东经过埃及到达红海之滨，长 5600 千米，南北宽 2000 千米，总面积约 932 万平方千米，横跨北非诸多国家。其平均海拔 300 余米，主要由一条条平行排列的沙垄沙漠所组成。
尼罗河是一条流经非洲东部与北部的河流，与中非地区的刚果河以及西非地区的尼日尔河并列非洲最大的三个河流系统。全长 6650 千米，是世界上最长的河流，流域面积 334.9 万平方千米。 占据非洲大陆总面积超过 1/9。河口区域年均流经的水量大约为 810 亿立方米。
Host: Welcome to our game show! Today, it’s all about geography.
Answer as quickly as you can! Question one: What is the highest mountain in the world
Fu Xing: It’s Mount Qomolangma! Host: Correct! How high is it
Liu Hongyu: I know this——it’s 8,848.43 metres high. Host: No, sorry. Fu Xing
Fu Xing: Is it 8,848.86 metres
Host: Yes! But some scientists say Qomolangma is still growing taller!
Now, name the biggest desert in the world.
Fu Xing: The Taklimakan Desert Host: Wrong! Ella
Ella: It’s the Sahara Desert. Host: Right! Now, how big is it
Ella: It’s about 9,000,000 square kilometres.
Host: That’s right! What’s the lowest place on earth Liu Hongyu: It’s the Dead Sea!
Host: Well done! Its surface is 416 metres below sea level.
Now where’s the deepest point in the ocean
Fu Xing: It’s in the Mariana Trench. Host: That’s correct! How deep is it
Fu Xing: It’s about 11,000 metres deep. Host: Correct!
Listening scripts
1b
Listen to the game plete the descriptions of the places.
While-listening
Place Description
Mount Qomolangma the in the world
Sahara Desert the in the world
Dead Sea the on earth
Mariana Trench the in the ocean
highest mountain
biggest desert
lowest place
deepest point
在地球上
Language points
_____ metres high
_____ metres below sea level
（1）〔名词〕高度
The mountain is over 3,000 metres above sea level. 这座山海拔3 000 多米。
sea level 海平面
（2）〔名词〕水平；程度
He studies hard to improve his English level.
他努力学习以提高他的英语水平。
Language points
_____ metres below sea level
(1)〔介词〕在……下面
Please don’t stand below that bridge. 请不要站在那座桥下面。
(2)〔介词〕低于 —— It was three degrees below zero this morning.
今天早晨的温度是零下三度。
From the top of the mountain, I could see the village below. 从山顶上我可以看到下面的村庄。
辨析：below与under两者都表示“在……下面”。区别如下：
below 表示在某物的下方，但不一定是在正下方，反义词是above Write the answers below each question.
把答案写在每个问题的下面。
under 表示在某物的正下方，反义词是over The farmer is standing under the tree. 那个农民正站在树下。
（3）〔副词〕在下面；低于 不强调垂直的“下面
1c
While-listening
Listen again. Complete the measurements in 1b with the numbers below.
416 8,848.86 11,000 9,000,000
Place Measurement
Mount Qomolangma metres high
Sahara Desert about square kilometres in size
Dead Sea metres below sea level
Mariana Trench about metres deep
平方千米 拓展：square metres 平方米
英语数字的读法
英语中，数字从后往前数，每三位标一个逗号。例如：9, 000, 000
百位和十位中间加and
小数点读作point，小数点后的数字要单独读出。
thousand
million
four hundred and sixteen
eight thousand eight hundred and forty-eight point eight six
eleven thousand
nine million
在尺寸上；在大小方面
低于海平面
8,848.86
9,000,000
416
11,000
Language points
B: Its surface is… metres below sea level.
〔名词〕表面；表层
当指“水面”或“液面”时，常用单数形式。
Nearly 10% of the earth’s surface is covered by ice.
地球表面将近10% 被冰覆盖。
拓展： on the surface 表面上；从外表看；乍一看
On the surface, it seems to be my fault.
表面上看，这似乎是我的过错。
1d
Pair Work
Talk about the places you have learnt about.
A: What’s the lowest place on earth B: It’s ...
A: How low is it B: Its surface is ... metres below sea level.
A: Now, what’s ...
A: What’s the lowest place on earth
B: It’s the Dead Sea.
A: How low is it
B: Its surface is 416 metres below sea level.
A: Now, what’s the highest mountain in the world
B: It’s Mount Qomolangma.
A: How high is it
B: It’s 8,848.86 metres high.
Exercises
1. 大自然的奇迹
2. 尼罗河
3. 死海
4. 8848.86米高
5. 平方千米
6. 低于海平面416米
7. 在地球上
基础巩固
I. 翻译下列短语
the wonders of nature / natural wonders
Nile River
Dead Sea
8848.86 metres high
square kilometre
416 metres below sea level
on earth
Exercises
基础巩固
( )1. Mount Qomolangma is the in the world.
A. longest river B. highest mountain C. biggest desert D. deepest trench
( )2. The Dead Sea is the place on earth.
A. highest B. lowest C. largest D. smallest
( )3. Which place is about 9,000,000 square kilometres in size
A. Mount Qomolangma. B. Sahara Desert.
C. Dead Sea. D. Mariana Trench.
( )4. People research the deep sea to know more about .
A. space B. deep-sea animals C. mountains D. deserts
( )5. --- How is it --- Its surface is about 400 metres below sea level.
A. high B. big C. tall D. low
II. 单项选择
B
B
B
B
D
Summary
What is amazing about nature
A: What’s the lowest place on earth
B: It’s ...
A: How low is it
B: Its surface is ... metres below sea level.
A: Now, what’s ...
Homework
Ask and answer with your partner based on the information in 1b and 1c.
Search online to know more about nature.
Do some related exercises.
Look and say
What place do these photos show us
Mariana Trench
What’s the deep sea like What’s in the deep sea
Can we go down into the deep sea
Pre-listening
2a
What do you know about the deep sea
dark
silent
cold
high pressure
dangerous
Pre-listening
2a
Complete the sentences with the information from the picture.
1. Fendouzhe reached
______________.
2. The deep sea begins at
______________.
3. The Titanic rests at
______________.
4. A whale can dive to
______________.
D
A
C
B
Language points
OCEAN DEPTHS
〔名词〕深（度）；纵深
拓展： 询问某物的深度时，常用句型“What’s one’s depth ”或“What’s the depth of... ”，相当于“How deep is/are... ”。
We found water at a depth of 20 metres. 我们在20 米深处找到了水。
形容词形式：deep 深的；有……深的
What’s the depth of the lake here =How deep is the lake here 这儿的湖水有多深？
4. A whale can dive to _____.
（1）〔动词〕潜水；跳水；俯冲
I dived below the surface of the water. 我潜入了水中。
He likes diving into the swimming pool on hot days. 在炎热的天气里，他喜欢跳进泳池。
（2）〔名词〕潜水；跳水；俯冲
The diver made a dive to a depth of 18 metres. 那名潜水者潜到了18 米水深处。
Listening scripts
Ms Gao: Thank you for the wonderful talk, Mr Jones. Now, does anyone have any questions
Emma: I do! Why are so many countries researching the deep sea
Mr Jones: Well, curiosity is one reason. We don’t know enough about the ocean floor.
Fu Xing: I remember that in 2020, China’s Fendouzhe dived deeper into the Mariana
Trench than many other submersibles in the world and filmed it.
But I didn’t see any deep-sea animals. What are they like
Mr Jones: Well, many deep-sea animals are large and unusual. Some animals are blind,
but they can “see” as well as others. Some even create their own light!
Peter: Cool! Are there any other surprising facts about the deep sea
Mr Jones: Did you know that there’s rubbish even at 11,000 metres deep
That shocked many people.
Ms Gao: That’s terrible! We should do something about it.
Mr Jones: You’re right!
2b
While-listening
A class is asking a deep-sea researcher some questions after his talk. Listen and tick the topics they discuss.
where the deep sea begins
why people are researching the deep sea
which Chinese submersible dived deeper
in the water than many others
what deep-sea animals are like
how everyone should protect the deep sea
2c
While-listening
Listen again. Complete the sentences with the facts from the conversation.
1. People still don’t know much about the .
2. In , China’s Fendouzhe dived into the deep sea
and filmed it.
3. Some animals have unusual abilities. Some are
but can “see”. Some can even create their own .
4. There is rubbish even at metres deep.
ocean floor
2020
blind
light
11,000
Language points
Some animals have unusual abilities …
〔形容词〕特别的；不寻常的；罕见的
The coach has an unusual name. 这个教练有个特别的名字。
It’s unusual to see a rainbow in the desert. 在沙漠里看到彩虹是很罕见的。
拓展
Post-listening
2d
Read the questions and think of more you would like to ask the deep-sea researcher.
What is the largest shark in the deep sea
What is the bottom of ( ……的底部) the deep sea like
Why is it important to research the deep sea
It’s the whale shark.
It’s totally dark. No plants grow here, and many animals make their own light to find food or communicate. Besides, it’s very cold, with temperatures staying around 0℃~4℃ all year round. The pressure is also super high.
There are several reasons. Firstly, it supports ocean life. Many fish and sea animals depend on the deep sea for food or safe places to live. Secondly, it has many valuable resources (资源) for us to use in our life. Thirdly, it helps regulate (调节) Earth’s climate. The deep sea stores lots of carbon (碳), keeping our world from getting too hot.
Post-listening
2d
Then ask and answer the questions with a partner.
What is the largest shark in the deep sea
It’s the whale shark.
What is the bottom of the deep sea like
Quick response
Clear voice
Correct language
Language points
What is the bottom of the deep sea like
〔名词〕底部；最下部 对应词：top 顶部；顶端
What is there at the bottom of the deep sea 深海底部有什么？
They cleaned the house from top to bottom before the Spring Festival.
春节前，他们把房子彻底打扫了一遍。
(at) the bottom of（在）……的底部
from top to bottom 从上到下；彻底地
搭配
Exercises
基础巩固
1. The Pacific Ocean is the (big) ocean in the world.
2. Her English (level) is very high.
3. We need to do some (research) on this topic.
4. It was an (usual) day because it snowed in summer.
5. The (deep) of the lake is about 50 metres.
I. 用所给单词的适当形式填空
biggest
level
research
unusual
depth
Exercises
素养提升
II. 用方框内所给单词的适当形式填空，有两个多余
wonder measurement dry level surface depth
dive research unusual kilometre development desert
In a huge 1. , there's a small lake. People always 2. why it exists here — deserts are usually extremely 3. !
Scientists came to carry out 4. on this lake. First, they took a
5. of it. They found the lake is about 5 square 6. in size. Then, they checked its 7. and discovered it's 10 metres deep. Some scientists were so curious that they even 8. into the water to see what's under the 9. .
Although the water level changes a bit from time to time, the lake never disappears. It's really 10. to have such a lake in a desert. This place is a natural wonder. It makes us realize how amazing and full of surprises nature can be.
desert
wonder
dry
research
measurement
kilometres
depth
dove/dived
surface
unusual
Summary
Deep ocean
Research reason
China’s Fendouzhe
deep-sea animals
environment
(生态环境)
the appearance (样貌)
of the ocean floor
Introduce the deep sea to your friends.
Search online to learn more about the deep sea.
Do some related exercises.
Homework
Yaming: Welcome back, Ella! How was your trip
Ella: It was great! We saw the Hukou Waterfall on the Yellow River.
Is that the longest river in China
Yaming: No, the Yangtze River is the longest river in China. It travels the farthest and is
about 6,300 kilometres long. The Yellow River is 5,464 kilometres long and is
the second longest. By the way, do you know why it's called the Yellow River
Ella: Because it's yellow
Yaming: Right. Some parts of the river carry brown and yellow earth.
Ella: That's interesting! I like learning about rivers. My favourite is the Nile.
Did you know it's the longest river in the world
Yaming: Yes, it's 6,671 kilometres long. It's very important in Egypt's history.
Ella: That's right. Both the Nile and the Yellow River helped ancient civilizations
to develop. And they're still very important today.
Yamning: Yes. In China, we even call the Yellow River our "mother river"!
Ella: We should protect them at all costs.
While-listening
Read the conversation and underline the three rivers mentioned.
3a
Yaming: Welcome back, Ella! How was your trip
Ella: It was great! We saw the Hukou Waterfall on the Yellow River.
Is that the longest river in China
Yaming: No, the Yangtze River is the longest river in China. It travels the farthest and is
about 6,300 kilometres long. The Yellow River is 5,464 kilometres long and is
the second longest. By the way, do you know why it's called the Yellow River
Ella: Because it's yellow
Yaming: Right. Some parts of the river carry brown and yellow earth.
Ella: That's interesting! I like learning about rivers. My favourite is the Nile.
Did you know it's the longest river in the world
Yaming: Yes, it's 6,671 kilometres long. It's very important in Egypt's history.
Ella: That's right. Both the Nile and the Yellow River helped ancient civilizations
to develop. And they're still very important today.
Yamning: Yes. In China, we even call the Yellow River our "mother river"!
Ella: We should protect them at all costs.
While-reading
Text analysis
n. 瀑布
顺便说一下
为“Is it because it’s yellow ”的省略句，在口语对话中很常见，为了使对话更简洁、快速
(不可数名词）土；泥；泥土
n. 文明
call sb/sth sth 称呼某人/某物为……
不惜任何代价
Language points
—How was your weekend 你周末过得怎么样？ —It was not bad. 不错。
— How was/were... ……怎么样？用来询问过去的情况
— It was good/ great/ fantastic./ Great!/ ... 好的情况
— It was not bad./Terrible./... 一般或不好的情况
Welcome back, Ella! How was your trip
No, the Yangtze River is the longest river in China.
主语
谓语动词
最高级
名词
这是最高级的常用结构之一，副词最高级前的the可以省略。
This is the most interesting story of all. 这个是所有故事中最有趣的。
Eric works (the) hardest in Class 1. 在一班埃里克学习最努力。
主语+谓语动词（+the）+最高级（+名词）+in/of...
……在某一范围内或某类人或物中（是）最……（的……）
Language points
The Yellow River is 5,464 kilometres long and is
the second longest.
主语
be动词
序数词
形容词最高级
Sam is the second tallest boy in his class. 萨姆是他班里第二高的男生。
主语+be动词+the+序数词+形容词最高级（+名词+in/of...）
……是（某一范围内或某类人或物中）第……（的……）
Both the Nile and the Yellow River helped ancient civilizations to develop.
both... and... ……和……都；既……又……
通常连接两个并列的成分。连接两个并列主语时，谓语动词用复数形式。
Both my brother and I are interested in deep-sea animals. 我和哥哥都对深海动物感兴趣。
Post-reading
What do Yaming and Ella know about these rivers
Read the conversation again and complete the table.
3b
River Country Length Importance
Yellow River __________ __________ km helped in the development of ancient _____________
Nile River __________ __________ km Yangtze River __________ __________ km the _________ river in China
China
5,464
Egypt
6,671
civilizations
China
6,300
longest
n. 发展；壮大
陕西黄河壶口瀑布
Think and share
What else do you know about the three rivers
Yangtze River
Yellow River
Nile River
Think and share
What else do you know about the three rivers
发源于青海省西南部、青藏高原上的唐古拉山脉主峰各拉丹冬雪山，曲折东流，干流先后流经11个省、自治区和直辖市，最后注入东海。
是中国、亚洲第一大河，全球第三长河流。素有中国“黄金水道”之称，通航里程达2800多千米。
Yangtze River
地理位置
重要性
Yellow River
发源于青藏高原巴颜喀拉山北麓的约古宗列盆地，自西向东流经9个省（自治区），最后在东营市垦利区流入渤海。
黄河是中华文明最主要的发源地，中国人称其为中华民族的“母亲河”。每年都会携带十六亿吨泥沙，其中有十二亿吨流入大海，剩下四亿吨长年留在黄河下游，形成冲积平原，有利于种植。
地理位置
重要性
是一条流经非洲东部与北部的河流，与中非地区的刚果河以及西非地区的尼日尔河并列非洲最大的三个河流系统。有两条主要的支流，白尼罗河和青尼罗河。于喀土穆交汇，为尼罗河的干流。穿越11国，最终汇入地中海。
是世界文明发祥地之一，这一地区的人民创造了灿烂的文化，在科学发展的历史长河中做出了杰出的贡献。
地理位置
重要性
Nile River
Language points
helped in the development of ancient _________
由“develop（v. 增强；发展）+-ment（名词后缀）”构成
in the development of... 在……的发展过程中
Computers play an important role in the development of modern science. 计算机在现代科学发展中起重要作用。
搭配
development 的相关词:
拓展
Pair Work
3c
Listen to the conversation. Then role-play it.
Checklist Stars
Speak fluently and clearly ☆☆☆
Beautiful pronunciation and tones ☆☆☆
Facial expressions and body language ☆☆☆
Full of emotion ☆☆☆
3d
Imagine that you are Yaming or Ella. Continue the conversation with a partner about other geographical features in China.
Ella: Could you tell me more about China, Yaming
Yaming: Sure! What would you like to know
Ella: What’s the biggest desert in China
Yaming: It’s the Taklimakan Desert.
Ella: Do you know...
Post-reading
would like to do sth 想要做某事
/ t kl mɑ k n/
Exercises
基础巩固
1. 顺便说一句 2. at all costs
3. 第二长河 4. 母亲河
5. ancient civilization
Il. 用所给单词的适当形式填空
1. This small village (develop) into a busy town in the past ten years.
2. These (waterfall) in this village are very beautiful after rain.
3. Ancient (civilize) left many interesting stories for us.
4. Online learning is a useful (means) for students to study at home.
5. People all over the world are working hard to stop the spread of (desert).
I. 写出下列短语的中文或英文释义
by the way
不惜任何代价
the second longest river
mother river
古代文明
has developed
waterfalls
civilization
means
deserts
Exercises
基础巩固
( )1. With the of science, our life gets better.
A. progress B. development C. change D. improve
( )2. The Great Wall is a symbol of ancient ,
showing how people worked together to protect their country.
A. city B. place C. civilization D. town
( )3. --- Can we try the new game --- ! It must be fun.
A. By all means B. By the way C. No way D. You'd better not
( )4. The river is 500 metres and 3 metres in .
A. high; height B. wide; width C. long; depth D. tall; size
( )5. The Taklimakan is the biggest one in China.
A. Building B. Desert C. River D. Mountain
III. 单项选择
B
C
A
C
B
Ella: Do you know how big the Taklimakan Desert is
Yaming: Yes. It’s about 337,000 square kilometres in size.
Ella: Wow, that’s huge! What’s the largest waterfall in China
Yaming: It’s Huangguoshu Waterfall.
It’s also one of the most famous natural wonders in Asia.
Ella: Do you know how large it is
Yaming: Yes. It is about 77 metres high and 100 metres wide. It looks like a “white curtain”
pouring from the sky. Every year, lots of people come to visit the natural wonder.
Ella: That sounds amazing! I’d love to visit it some day.
For example
黄果树瀑布
塔克拉玛干沙漠
Rivers are the past and present of human civilization.
The deep sea may be the future.
To protect water is to protect life itself.
Homework
Review the language points.
Talk about geographical features in China with your classmate.
Do some related exercises.
Review
Look and fill in the blanks.
the Sahara Desert
What is the ________ desert in the world
It’s the Sahara Desert.
biggest
How big is it
It’s about __________ square kilometres in size.
9,000,000
Where is the _______ point in the ocean
How deep is it
It’s about _______ metres deep.
What are the deep- sea animals like
Some animals are blind, but they can “see” as as others.
deepest
It’s in the Mariana Trench.
11,000
well
The Yangtze River travels the in China and is about 6,300 kilometres long.
Mount Qomolangma is one of the wonders of the world, and it is still growing .
greatest
taller
farthest
Grammar Focus
4a
Read the sentences. Circle the adjectives which compare things. Underline the adverbs which compare actions.
What is the biggest desert in the world？ It is the Sahara Desert.
How big is it？ It is about 9,000,000 square kilometres in size.
Where is the deepest point in the ocean？ It is in the Mariana Trench.
How deep is it？ It is about 11,000 metres deep.
Some deep-sea animals are blind, but they can “see” as well as others. Mount Qomolangma is one of the greatest wonders of the world, and it is still growing taller. The Yangtze River travels the farthest in China and is about 6,300 kilometres long.
Grammar Focus
4a
概述
语法回顾: 形容词和副词的比较级和最高级
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。
Let’s think
What is the biggest desert in the world
Where is the deepest point in the ocean
Some deep-sea animals are blind, but they can “see” as well as others.
Mount Qomolangma is one of the greatest wonders of the world,
and it is still growing taller.
在对比两者或两者以上的事物时，运用了形容和副词的哪几种形式？
最高级
原级
比较级
Grammar Focus
4a
语法回顾: 形容词和副词的比较级和最高级
Let’s think
（1）规则变化
构成方法 示例
单音节词 和部分 双音节词
多音节词 和部分 双音节词
low→ lower→ lowest deep→ deeper→ deepest
wise→ wiser→ wisest simple→ simpler→ simplest
lonely→ lonelier→ loneliest
happy→ happier→ happiest
hot→ hotter→ hottest big→ bigger→ biggest
interesting→ more interesting → most interesting
carefully→ more carefully →most carefully
一般情况下，在词尾加-er或-est
以字母e结尾的词，在词尾加-r或-st
以“辅音字母+y”结尾的词，先把“y”变为“i”，再加-er或-est
以一个辅音字母结尾的重读闭音节词，双写该辅音字母，再加-er或-est
在词前加more或most
构成
Grammar Focus
4a
语法回顾: 形容词和副词的比较级和最高级
Let’s think
（2）不规则变化
原级 比较级 最高级
good/well
bad/badly/ill
little
many/much
far
better
worse
less
more
father/further
best
worst
least
most
farthest/ furthest
Grammar Focus
4a
语法回顾: 形容词和副词的比较级和最高级
Let’s think
比较级的用法
形容词与副词的比较级常用于两者之间的比较，
表示两者之间的差异。常用结构如下：
(1)“A+谓语动词+比较级+than+ B” 用于两者间的比较，意为“A比B更……”。
The Sahara Desert is larger than the Gobi Desert. 撒哈拉沙漠比戈壁沙漠更大。
The cheetah can run faster than the tiger. 猎豹能比老虎跑得更快。
Lake Baikal is deeper than any other freshwater lake in the world.
=Lake Baikal is the deepest freshwater lake in the world.
贝加尔湖是世界上最深的淡水湖。
(2) “A+谓语动词+比较级+than any other+ B（可数名词单数）”用于同一范围内的比较，意为“A比其他任何一个B都……”，表示最高级的含义。
Grammar Focus
4a
语法回顾: 形容词和副词的比较级和最高级
Let’s think
The higher you climb a mountain, the thinner the air becomes.
你爬山爬得越高，空气就变得越稀薄。
(3) “the+比较级…, the +比较级… ”意为 “越……，越……”。
Because of climate change, our earth is getting warmer and warmer.
由于气候变化，我们的地球正变得越来越暖和。
The Internet is becoming more and more important in our daily life.
互联网在我们的日常生活中变得越来越重要。
(4) “比较级+and+比较级”意为“越来越……”。 当形容词或副词为多音节词或部分双音节词时，用“more and more+形容词/副词原级”结构。
比较级的用法
Grammar Focus
4a
语法回顾: 形容词和副词的比较级和最高级
Let’s think
(5) “主语+谓语动词+the+比较级+of the two...”
意为“……是两者之中较……的那个”，是特指的情况。
(6) “Who/Which+谓语动词+比较级, A or B ”
表示两者之间进行比较，意为“谁/哪一个更……，A还是B？”。
Amy is the taller of the two girls. 埃米是两个女孩中较高的那个。
Which waterfall is larger, the Hukou Waterfall or the Huangguoshu Waterfall
哪个瀑布更大，壶口瀑布还是黄果树瀑布？
比较级的用法
注意
Grammar Focus
4a
语法回顾: 形容词和副词的比较级和最高级
Let’s think
（1）比较的对象必须一致，为避免重复，常用that/one 或those/ones代替前面的名词。
High-speed trains are much faster than traditional ones. 高速列车比传统的列车快很多。
（2）在上文意思明确的情况下，可以单独使用“a/an+比较级+one”，
意为“又一/再一更……的……”。
（3）比较级前可用much，a lot，a little，a bit，even，far等修饰，用来加强语气或表示程度。
The sweater is a little bit short. Pass me a longer one, please.
这件毛衣有点短。请递给我一件长点的。
The river is much deeper than that one. 这条河比那条河深得多。
Grammar Focus
4a
语法回顾: 形容词和副词的比较级和最高级
Let’s think
(2) one of the+形容词最高级+可数名词复数 “最……的……之一”
最高级的用法
形容词与副词的最高级常用于三者或三者以上的人或物之间的比较。
常用结构如下：
Greenland is the biggest island in the world. 格陵兰岛是世界上最大的岛屿。
It is one of the busiest streets in our town. 它是我们镇上最繁忙的街道之一。
Sam is the second tallest boy in his class. 萨姆是他们班第二高的男生。
(3)主语+谓语动词+the+序数词+形容词最高级+名词+in/of... ……在……中是第……的……
(4) Who/Which+谓语动词（+the）+最高级，A，B or C 在A、B 和C中，谁/哪一个……最……？
Which season is the most beautiful, spring, summer or autumn 春天、夏天和秋天中，哪个季节最美？
Who jumps highest, Tom, Jim or Mike 汤姆、吉姆和迈克中，谁跳得最高？
(1) the+最高级+in/of... ……中最……
注意
Grammar Focus
4a
语法回顾: 形容词和副词的比较级和最高级
Let’s think
（1）形容词最高级作表语时，the有时可省略。
This movie is (the) most exciting. 这部电影最刺激。
（2）副词最高级前的the一般可以省略。
Lucy dances (the) best of all the girls. 露西在所有女孩中跳舞跳得最好。
Tom’s best friend is from Canada. 汤姆最好的朋友来自加拿大。
This is my youngest brother. 这是我最小的弟弟。
（3）最高级前有名词所有格或物主代词时，不再用the。
Grammar Focus
4a
语法回顾: 形容词和副词的比较级和最高级
Let’s think
最高级与比较级之间的转换
形容词与副词的最高级可与“比较级+than any other+单数名词”
或“比较级+than the other+复数名词”进行转换。
试着翻译下面的句子
汤姆是他班里最小的学生。
Tom is the youngest student in his class.
=Tom is younger than any other student in his class.
=Tom is younger than the other students in his class.
Grammar Focus
4a
语法回顾: 形容词和副词的比较级和最高级
专项演练
用括号内所给单词的适当形式填空
1. My father is much ________ (heavy) than me.
2. The scientists found one of the _________ (tall) trees in the world.
3. This ancient bridge is the third _________ (old) building
in our hometown, with a history of over 100 years.
4. Qinghai Lake is _________ (large) than any other salt lake in China.
5. When Helen won a prize in the English competition,
she believed she was the _________ (happy) girl in the world.
heavier
tallest
oldest
larger
happiest
Exercises
1. This book is more interesting than that one. (改为同义句)
That book is than this one.
2. Is Mike taller than Jack (改为选择疑问句)
is , Mike or Jack
3. The Mariana Trench is the deepest point in the ocean. (改为同义句)
The Mariana Trench is than point in the ocean.
4. Mount Fuji is lower than Mount Qomolangma. (改为同义句)
Mount Fuji is not Mount Qomolangma.
5. How deep is the lake (改为同义句)
the of the lake
基础巩固
句型转换
less interesting
Who taller
deeper any other
as/so high as
What's depth
Grammar Focus
4a
How big is it？ It is about 9,000,000 square kilometres in size.
How deep is it？ It is about 11,000 metres deep.
The Yangtze River travels the farthest in China and is about 6,300 kilometres long. Let’s think
试着读出画横线部分的大数字？你能发现什么规律？
读作：nine million
读作：eleven thousand
读作：six thousand and three hundred
Grammar Focus
4a
Let’s learn
大数字的表达与读法
大于1000的基数词的表达法：从右至左数，每三位数加一个逗号（即以此把数字分为若干段）。第一个逗号前的数为 thousand（千），第二个逗号前的数为 million（百万），第三个逗号前的数为 billion（十亿）。
5,764
19,357,095
265,468
five thousand, seven hundred and sixty-four
two hundred and sixty-five thousand, four hundred and sixty-eight
nineteen million, three hundred and fifty-seven thousand, and ninety-five
For example
Grammar Focus
4a
Let’s learn
大数字的表达与读法
注意
典例
（1）英语没有“万”这个单位，要表示“万”须借用thousand，
如“一万”用“十个千（ten thousand）”
表示，“十万”用“百个千（one hundred thousand）”。
（2）在hundred 后通常加上连词and。若读数中百位数为0，则在thousand后加and。
The number “23,456” can be read as“________”．
A. twenty-three thousand, four hundred and fifty-six
B. twenty-three thousand and four hundred fifty-six
C. two three thousand and four five six
D. two three thousand, four and five six
A
Exercises
1. Mount Qomolangma is (eight thousand, eight hundred
and forty-eight point eight six) metres high.
2. (one hundred and twenty-three thousand, four hundred
and fifty-six) people visited the museum last year.
3. The Great Wall is about 21,196 ( ) kilometres long.
4. The Amazon Rainforest has an area of about 5, 500.000
( ) square kilometres.
5. There are (nine thousand, nine hundred and ninety-nine)
books in this library.
基础巩固
写出数字或者拼出单词
123,456
twenty-one thousand, one hundred and ninety-six
8,848.86
five million, five hundred thousand
9,999
Grammar Focus
4b
Write or spell out the numbers.
1. Mount Kilimanjaro is ________ (five thousand, eight hundred
and ninety-five) metres high.
2. __________ (twenty-five thousand, seven hundred and sixty-
eight) cubic metres of water pours down Inga Falls each second.
3. The East African Rift Valley is about 4,000 (______________)
miles long.
4. The Taklimakan Desert has a total area of about 337,000
( ) square kilometres.
5, 895
乞力马扎罗山
倾泻而下
英加瀑布
25, 768
东非大裂谷
four thousand
……总面积为……
three hundred and thirty-seven thousand
Grammar Focus
4c
Complete the passage with the correct forms of the words in the box.
large amazing far close loud
My friends and I visited Victoria Falls in Africa last year.
Visiting one of the world’s _________ waterfalls was a
magical experience. As we went ________ to the falls, the noise of the water slowly grew _________ and louder. Then, right before our eyes, the waterfall appeared. It went on for as _______ as the eye could see. Later, we sat in a special pool at the top of the falls. There, we felt the water rush past us and become a part of the waterfall. It was the scariest but also the _____________ experience of our trip!
维多利亚瀑布
largest
closer
go close to 靠近；接近
louder
就在眼前；眼皮底下
far
as far as the eye can see 极目所尽
most amazing
Grammar Focus
4d
Write some questions to compare places.
Then ask a partner your questions.
What is the highest...
Which park is bigger, ... or ...
疑问词（组）+谓语动词+比较级，A or B A和B，……更……？
For example
A: What is the highest tower in China
B: It’s the Shanghai Tower.
A: Which park is bigger, Hyde Park or Greenwich Park
B: Hyde Park.
A: What’s the deepest lake in the world
B: It’s Lake Baikal.
A: Which river is longer, the Yangtze River or the Nile River
B: The Nile River.
Exercises
( )1. Which is the correct way to write "5,892" in English
A. Five thousand, eight hundred ninety-two.
B. Five thousand, eight hundred and ninety-two.
C. Five thousands, eight hundred and ninety-two.
D. Five thousand and eight hundred ninety-two.
( )2. The Sahara Desert is one of the in the world.
A. large desert B. largest deserts C. largest desert D. large deserts
( )3. Which park is , Linghu Park or Sunshine Park
A. big B. bigger C. biggest D. the biggest
( )4. The path in the forest stretched out(伸出), and the eye could see,
there were only tall trees on both sides.
A. as far as B. as long as C. as wide ns D. as deep as
( )5. My home is the school than yours. So I can walk to school every day.
A. close to B. closer to C. closest to D. the closest to
基础巩固
I. 单项选择
B
B
B
A
B
Exercises
1. The class has become much (interesting) and creative.
2. The weather is getting and (cold).
3. He is (tall) of the two brothers.
4. Which is (expensive), the red shirt or the blue one
5. This is (good) movie I have ever seen.
6. She is one of (beautiful) girls in our school.
7. Which is (big), the elephant, the tiger or the lion
8. The (hard) you work, the (good) result you will get.
9. He runs (fast) than any other student in his class.
10. She is (thin) than the other girls in her group.
II. 用所给词的比较级或者最高级形式填空
基础巩固
more interesting
colder colder
the taller
more expensive
the best
the most beautiful
the biggest
harder
better
faster
thinner
Homework
Review the grammar of this lesson.
Do some related exercises.

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