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(共19张PPT)
Unit 4 The Wonders of Nature
Section A (3a-4d)
学 习 目 标
In this unit ,you will
1. talk about geography facts about natural wonders .
2. compare facts about famous places .
3. share geography facts using large numbers .
4. explore how and why people conncet with nature .
3a
Read the conversation and underline the three rivers mentioned.
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 Africa
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.
Yaming:Yes. In China,we even call the Yellow River our“mother river”!
Ella: We should protect them by all means.
欢迎回来
顺便说一下
母亲河
当然可以
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 ___________
NileRiver ____________ ____________km
5,464
6,671
civilizations to develop
in China
in Egypt
The Yellow River is 5,464 kilometres long and is the second longest.
5,464 kilometres long 5464公里长
the second longest 第二长的
Yangtze River is about 6,300 kilometres long .
Yes,it's 6,671 kilometres long
级别 定义 常用标志词 / 结构高频 例句
原级 描述 “单个事物的特征”，或 “两者同等程度” as + 原级 + as（和…… 一样）；not as/so + 原级 + as（不如……） He is tall.（描述单个特征）
She runs as fast as me.
（两者同等）
This book is not so nteresting as that one.
（两者不同等）
比较级 ...得多表示 “两者之间的比较”，强调 “更……” than（比）；much/even/a little（修饰比较级，表程度） Tom is taller than Jim.（两者身高对比）
This bag is much heavier than that one.（much 修饰比较级，表 “……
最高级 表示 “三者及以上比较”，强调 “最……” the + 最高级；in/of（表比较范围，如 in our class、of the three） He is the tallest in our class.（班级里三者以上比较）
This is the most delicious food of all.（所有食物中比较）
形容词和副词的原级、比较级、最高级
good/well better best 好的 / 好地
bad/badly worse worst 坏的 / 坏地
many/much more most 许多
little less least 少的
far farther/further farthest/furthest 远的（farther 表距离，further 表程度）
old older/elder oldest/eldest 老的 older 表年龄，elder 表辈分，如 elder sister 姐姐）
形容词和副词的原级、比较级、最高级
不规则变化
好坏多少是元（远）老
原形 比较级 最高级
By the way,do you know why it's called the Yellow River
By the way 顺便说一下
用于引入补充信息或转换话题的过渡短语
例句：
By the way, have you seen my keys
（对了，你看到我的钥匙了吗？）
We should protect them by all means.
by all means 当然可以
表达强烈许可或鼓励的短语，正式场合也可译为"务必"。
例句：
By all means take the day off if you're unwell.
如果身体不适，请务必休假）
Listen to the conversation.Then role-play it.
3c
Welcome back,Ella!How was your trip
It was great!
。。。
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...
Read the sentences.Circle the adjectives which compare things.Underline the adverbs which compare actions.
4a
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 blind animals can"see"as well as others. Mount Qomolangma is still growing taller. The Yangtze River travels the farthest in China and is about 6,300 kilometres long 在尺寸上/在大小方面
多大
多深
和...一样
Write or spell out the numbers.
4b
1.Mount Kilimanjaro is______ (fivethousand,eighthundredandninety-five)metres high.
2. _________ (twenty-fivethousand,sevenhundredandsixty-eight)cubic metres of water pours down Inga Falls each second.
3.The East African Rift Valley is about ________(four thousand)miles long.
4.The Taklimakan Desert has a total area of about _________(three hundred and thirty - seven thousand )square kilometres.
5,895
25,768
4,000
337,000
立方米
每一秒
平方千米
英语数字的读法遵循三位一组的规则，从右向左依次为thousand（千）、million（百万）、billion（十亿）等。具体规则如下：
数字英语 读法
0-19：直接读，如 zero, one, two。
整十数（20-90）：如 twenty, thirty。
两位数（21-99）：如 twenty-one, thirty-five。
三位数（100-999）：如 one hundred, two hundred and twenty-five。
四位数及以上：以 thousand, million, billion 为单位分段读，
如 1,234,567 读作 one million two hundred (and) thirty-four thousand five hundred (and) sixty-seven。
Complete the passage with the correct forms of the words in the box。
4c
large scary 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____________.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
__________but also the___________experience of our trip!
...之一
largest
closer
louder
louder
far
scariest
most amazing
Write some questions to compare places.Then ask a partner your
questions.
4d
●What is the highest... ●Which park is bigger,...or...
1.珠穆朗玛峰是世界上最高的山峰。
Mount Qomolangma is the_______________mountain in the world.
2.撒哈拉沙漠大约有九百万平方千米大。
The Sahara Desert is about 9,000,000 square_______________insize.
3.死海的表面在海平面以下416米。
The__________of the Dead Sea is 416 metres below sea level.
4.长江是中国最长的河流。
The Yangtze River is the_______________river in China.
5.我们应该尽可能的保护这些河流。
We should protect these rivers_______________.
重点句子翻译填空（5个）
highest
kilometers
surface
longest
by all means
用所给词的适当形式填空（每空1分，共5分）
1.The Great Barrier Reef is one of the most amazing________（nature）wonders in the world．
2.We should take action to protect the________（danger）animals fromd is appearing．
3.The cave________（form）millions of years ago and has become a popular scenic spot．
4.We were________（amaze）by the wonderful views of the natural奇观during the trip．
5.The government is trying to reduce environmental________（pollute）to protect nature．
natural
dangerous
formed
amazed
pollution
Homework
1, 熟读新词汇并默写四会单词
2，练习册本节课练习题
3，复述课文

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