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(共16张PPT)
Unit 4　
The Wonders of Nature
第二课时　
Section A(3a—3d)
人教版 八年级 英语（下）
Lead-in
What is the name of the river mentioned in the video
It’s the Yellow River.
Is it the longest river in China
No, the longest river is the Yangtze River.
Do you know anything else about the Yellow River or the Yangtze River
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
最长的河流
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.
顺便提一下；附带问一句
长江
黄河
…… 的一些部分
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.
Yaming:Yes. In China, we even call the Yellow River our
“mother river” !
Ella: We should protect them at all costs.
了解；学习
在历史上
古代文明
help…to develop 帮助…… 发展
不惜任何代价
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 China
Egypt
5, 464
6, 671
civilizations
3c
Listen to the conversation. Then role-play it.
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...
Other geographical features in China
Language points
1、The Yellow River is 5，464 kilometres long.黄河全长5 464公里。
本句采用了“主语＋be动词＋数字＋单位＋形容词(long/wide/tall/high/deep).”的句型结构，该结构用于精确描述物体的尺寸，如长度、宽度、高度或深度等。
kilometres long表示“6 300千米长”，是“基数词+单位词+形容词”结构。
物体长、宽、高、深等的表达
基数词+单位词+形容词(long、wide、high、deep等)
基数词+单位词+in+名词(length、width、height、depth等)
The river is 20 metres wide (= 20 metres in width).
这条河宽20米。
2、We should protect them at all costs.我们应该不惜任何代价保护它们。
短语at all costs在句中作状语，意为“不惜任何代价”。在本短语中核心词cost用复数形式，其同义短语为at any cost。
【拓展】cost的用法
(1)作名词时，其常用短语还有：at the cost of (sth) “以牺牲……为代价”；cut/reduce costs“降低成本”。
(2)作动词时，其用法为：sth cost(s) sb＋金钱，常与sb spend(s)＋金钱＋on/(in) doing sth互相转换。
3、helped in the development of ancient civilizations
有助于古代文明的发展。
development n. 发展；壮大
[不可数名词]由“develop(v.发展)+-ment(名词后缀)”构成。
(with) the development of (随着)……的发展
We believe China will continue to lead the world in technology development. 我们相信，中国在科技发展方面将继续引领世界。
develop v.
发展；壮大
developed adj.
发达的
development n.
发展；壮大
developing adj.
发展中的
Homework
1．Copy and memorize the key sentence patterns in 3a.
2．Choose a geographical feature in China(such as Qinghai Lake or the Qinghai Tibet Plateau)，
and describe its location，size and
significance in three sentences.

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