(共28张PPT)
Lesson 38
The World Is a Big Place
Unit 7 Know Our World
同学们, 上一课学习的单词、短语和句型你们都掌握了吗？现在大家来检验一下, 点击下面的音频开始听写吧！
All of us have studied geography. Can you say the names of the continents and oceans in the world
THINK ABOUT IT
·How many continents are there in the world What are they
·What do you know about the place where you live
How many continents and
oceans does the world have
Can you point them out
The earth is a very special planet, and it faces a big problem. ① In the year 2010, the world’s population was over 7 billion in total. ② It is increasing very quickly. ③ By 2025, the world may have about 8 billion people. And by 2050, the world’s population may reach 9 billion.
温馨提示: 此符号表示“考点精讲点拨”链接。
There is another problem. People can’t live everywhere on the earth. We can’t live in water, and only about one third of our planet is land. ④ But parts of this land are very dry. These dry places are called deserts. Some areas have very high mountains. Others have a lot of snow and ice. It is not easy to live in those places.
There are seven continents: Asia, Africa, Australia, Antarctica, Europe, North America and South America. Antarctica is covered with snow and ice all year round. ⑤ Luckily, people can live on the other six continents. On these continents, there are green forests, fresh water and rich lands.
Oceans cover two thirds of the earth's surface. The earth has only one big ocean, but we use these names for its different parts: the Pacific Ocean, the Indian Ocean, the Atlantic Ocean and the Arctic Ocean. The Pacific Ocean is the largest one.
The earth is our home now, and it will be our home in the future. It must be treated well for our children and for our children’s children, too! ⑥
1) Read the lesson and match each paragraph with its main idea.
Paragraph 1 a. Six of the seven continents are good for people to live on.
Paragraph 2 b. We should treat the earth well.
Paragraph 3 c. An increasing population is a big problem for the earth.
Paragraph 4 d. Two thirds of the earth is covered with oceans.
Paragraph 5 e. People cannot live everywhere on the earth.
2) Fill in the blanks with the correct forms of the words in the box.
increase dry surface billion total
1. The number of swimmers here is __________ quickly because
it’s very hot these days.
2. The school has a ________ of 900 students.
3. I think it may be the ________ season of the year.
4. The ________ of our body is skin. It protects us.
5. How many ________ of people are there in the world now
increasing
total
driest
surface
billions
3) Match the seven continents with their correct descriptions.
It is the biggest continent. It has the highest point on the earth in the Himalayas.
Europe
South America
Asia
Africa
Australia
Antarctica
North America
It is the smallest continent. You can find koalas and kangaroos there.
It is the sixth largest continent. It is a good place for people to travel to.
It is the fifth largest continent. The South Pole is on this continent.
It is the fourth largest continent. There are 13 countries on this continent.
It is the third largest continent. Canada, Mexico and the U. S. are the three major countries on this continent.
It is the second largest continent. Many elephants, giraffes, zebras and lions live there.
①The earth is a very special planet, and it faces a big problem.
planet / pl n t/ n. (a large round object in space that moves around a star ) 行星
e. g. The earth is the only planet that we know has life at present.
地球是目前我们所知的唯一有生命存在的行星。
考点1
planet 为可数名词，指环绕恒星运转的星球。
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温馨提示：可返回原文
②In the year 2010, the world’s population was over 7 billion in total.
billion / b l n/ n. 十亿; 千兆
e. g. We want two billion. 我们想要20 亿。
There are billions of stars in the sky.
天上有数十亿的星星。
Hundreds of people were killed in the earthquake.
地震中有数百人丧生。
There are about five hundred students in this school.
这所学校大约有500 名学生。
考点2
与billion 用法类似的词有hundred，thousand，million。
billion前有数词修饰时，
billion不能用复数形式。
billions of意为“数十亿
的”，表示不确定的数量。
中考在线1: We all know that ________ birds fly to Dongting Lake in winter. [益阳]
A. million B. millions C. millions of
C
【点拨】句意为“我们都知道在冬季数百万的鸟飞往洞庭湖”。millions of… 意为“数百万的……”。
total / t tl/ n. 总计; 总数 adj. 总的; 总计的
e. g. A total of twenty letters were received last month.
上个月共收到20 封信。
You can choose four out of the total number.
你可以从总数中选出四个。
The problem is how much the total payment is.
问题是要支付的总额是多少。
In total over 1, 000 people attended the conference.
共计一千多人参加了这个会议。
考点3
a total of修饰可数名词复数时，其谓语动词用复数形式；the total of... 后的谓语动词一般用单数形式。
in total意为“总计；合计”
adj .总的；总计的，一般在句中作定语，不作表语。
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③It is increasing very quickly.
increase / n kri s/ v. 增加; 增大
e. g. These cases are on the increase.
这些案件在不断增加。
His power increased.
他的权力加强了。
考点4
反义词为decrease。也可作名词。
常用短语on the increase “正在增加；不断增长”。
The population of this city has increased by 5 percent.
这个城市的人口增长了5%。
Our coal output has increased to 6 million tons this year.
我们今年的煤产量增加到了六百万吨。
辨析：increase by 与increase to
① increase by ＋倍数或百分数，表示“增加了……倍或百分之……”。
② increase to＋具体增长后的数字，表示“增加到了……”
中考在线2: Developing good reading habits can _______ our reading speed. [抚顺、本溪、辽阳]
A. review B. receive C. spread D. increase
【点拨】本题采用词语辨析法。 review 评论; receive 收到; spread 传播; increase增加, 提高。句意为“养成良好的阅读习惯可以提高我们的阅读速度”。
D
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④We can’t live in water, and only about one third of our planet is land.
one third 三分之一
【易错点】分数表达法: 分子用基数词, 分母用序数词。分子如果大于1, 分母用复数形式。
考点5
提示: 二分之一不能说a/one second, 而要说 a/one half; 四分之一和四分之三常用a quarter 和 three quarters 表示。
e. g. Two thirds of the students in our class are girls.
我们班三分之二的学生是女生。
Three quarters of the information is true.
四分之三的信息是真实的。
当“分数＋of+名词”结构作主语时，谓语动词的单复数取决于of后面的名词。名词为可数名词复数，谓语动词用复数；名词为不可数名词，谓语动词用单数。
中考在线3: —Susan, how many women teachers are there in your school
—In our school, _______ of the teachers _______ women teachers. [玉林]
A. third fourth; are B. third fourth; is
C. three fourths; is D. three fourths; are
【点拨】句意为“—苏珊, 你们学校有多少女老师？—在我们学校, 四分之三的老师是女老师”。分数表达法: 分子用基数词, 分母用序数词; 分子大于一, 分母用复数。排除A、B 选项。“teachers”是复数形式, 故谓语动词用are。
D
中考在线4: About ______ of the students in Kaili ______ to school by bus. [黔东南]
A. two fifth; go B. two fifths; go
C. two fifth; goes D. two fifths; goes
【点拨】采用主谓一致法。句意为“大约五分之二凯里的学生乘公共汽车上学”。英语中, 分数的分子用基数词, 分母用序数词; 分子大于一时, 分母用复数形式。“分数+of+ 名词”作主语时, 谓语动词与of 后的名词保持数的一致。of 后“the students” 是可数名词复数, 则谓语动词用复数形式go。
B
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⑤Antarctica is covered with snow and ice all year round.
be covered with 被……覆盖
e. g. Our garden is covered with grass and flowers.
我们的花园被花草覆盖着。
Please cover this desk with a cloth.
请用一块布盖住这张课桌。
考点6
主动结构为：
cover...with...
(用……盖住……)
中考在线5: Most of the earth’s surface ______ by water. [新疆]
A. is covered B. covers
C. is grown D. grows
【点拨】句意为“地球表面的大部分被水 ”。cover 覆盖;
grow 种植, 生长。结合常识可知, 地球表面大部分被水覆盖。据此排除C、D。主语“Most of the earth’s surface”与谓语“cover”构成动宾关系, 应用被动语态。
A
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⑥It must be treated well for our children and for our children’s children, too!
情态动词的被动语态
本句中 must be treated 是含情态动词的被动语态, 其结构为“情态动词(should, must, may, can, could 等) ＋ be ＋动词的过去分词”。
考点7
中考在线6: —Mum, could I help you take out the rubbish
—Sure. But it ______ into different kinds for recycling first. [贵港]
A. separates B. should separate
C. was separated D. should be separated
【点拨】由问句“妈妈, 我能帮你倒垃圾吗？”可知答语中it 指代“垃圾”。答语中主语it 和动词separate 之间是被动关系, 故使用被动语态, 排除选项A 和B。由答语中“当然可以。但是首先……”可知垃圾还没有被分成不同种类, 妈妈在提醒他应该在倒垃圾之前先分成不同种类来循环利用。
D
treat v. 对待; 看待
e. g. They treat the dog as a member of their family.
他们把狗视作家庭的一员。
She treats every child with kindness.
她用善心对待每个孩子。
考点8
treat sb. as...
把某人看作……
treat/regard sb. with...
以……对待某人
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本节课我们主要学习了以下重点内容:
(1) 重点单词: increase
(2) 重点短语: be covered withLesson 38 The World Is a Big Place!
Learning aims:
1. Master the new words and expressions: planet; billion; total; increase; Indian; Atlantic; Arctic
2. Learn more about the world’s geography.
3. Master the words and expressions of the continents and oceans in English.
Learning important points:
1. The words and expressions in this lesson.
2. Know about the world’s physical features.
Learning difficult points:
Some geography features in the world.
Learning aids:
audiotape, flashcards, a map of the world
Learning steps:
Step 1. Talk about the question:
1. Where do you live
2. Do you like to live here Why
Step 2. Come to “THINK ABOUT IT”
Which part of the world do you live in
What do you know about the place where you live
Step 3. Listening task
Listen and answer the following questions:
1. How many people are there in the world
2. Where do all the people live
3. How big are the world’s oceans
4. How many deserts does the world have
5. What’s the world’s biggest island
6. What’s the world’s longest river
Step 4. Listening
Listen to the tape again and ask the students to imitate after it.
Step 5. Reading
Read the text again and talk about the details about the text.
How many deserts does the world have What are they Which is the second largest desert in the world
What’s the world’s longest river What is the second longest river What is the third longest river
What are the physical features of them
Step 6. Homework
Listen and read the text again.
Finish off your exercise book.
Write something about the world’s geography.
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