冀教版英语八年级下Unit 7 Know Our World Lesson 38 The World Is a Big Place课件+嵌入音频 （26张PPT）

planet /?pl?n?t/ n.行星
billion /?b?l??n/ n.十亿；千兆
total /?t??tl/ n.总计；总数
adj.总的；总计的
increase /?n?kri?s/ v.增加；增大
surface /?s??f?s/ n.表面；表层
Indian /??nd??n/ adj.印度的 n.印度人
Atlantic /?t?l?nt?k/ n. & adj. 大西洋（的）
Arctic /?ɑ?kt?k/ adj.北极的
words
The continents of the world
Asia
Europe
North America
Africa
Antarctica
Australia
South America
How many continents are there in the world? What are they?
How many oceans are there in the world? What are they?
the Atlantic Ocean
the Indian Ocean
The Arctic Ocean
The Pacific Ocean
The oceans of the world
The population of the world is increasing very quickly.
In the year 2010, the world’s population was over 7 billion in total.
Unit7 Know our world
Lesson38 The world is a big place
PART
01
Listening
Listening
Listen and fill in the blanks.
1. In 2010, the world’s population was over 7 billion ___________. By 2025, the world will have _____________ people.
2. About ____________of the world is land.
3. Oceans cover about _________________ of the earth’s surface.
4. The earth is our home now, and it will be _________ in the future.
in total
8 billion
one third
two thirds
our home
1. The world’s population was over 7 billion in total.
the population of…意为“…的人口”，作主语时，谓语动词用单数。
E.g: The population of Shenzhen is more than ten million.
深圳的人口超过1000万。
billion意为“十亿”，前面有基数词修饰时，billion不加s; 后与of连用时，billion加s
seven billion people 七十亿人
billions of people 几十亿人
2. The world’s population was over 7 billion in total.
in total意为“总计；总共”， 常常放在句末
E.g.: I was with my pet dog for five years in total.
我和我的宠物狗在一起的时间总共有五年。
total意为“总数；总计”， 可用于短语a total of
E.g.: A total of ten meetings were held to discuss the problem.
总共举办了十次会议来讨论这个问题。
3. About one third of our planet is land.
one third表示“三分之一；1/3”
分子（基数词）分母（序数词） 分子>1时， 分母+s; 分子>1时， 分母+s
① “分数+of+复数名词”作主语时，谓语动词用复数
② “分数+of+可n.单/不可n.”作主语时，谓语动词用单数
E.g.: Two thirds of the teachers here are woman. ①
One third of the land is polluted by waste water. ②

?
4. Oceans cover two thirds of the earth’s surface.
cover…with…表示“用…覆盖…” 其被动形式为 “be covered with…被…覆盖”
E.g.: Antarctica is covered with snow and ice all year round.
南极洲终年被冰雪覆盖。
It is snowing all day. The ground with snow.
A. cover B. is cover C. covered D. is covered
D
PART
02
Reading
Reading-fast reading
Para1. a. Six of the seven continents are good for people to live on
Para2. b. We should treat the earth well
Para3. c. An increasing population is a big problem for the earth
Para4. d. Two thirds of the earth is covered with oceans.
Para5 . e. People cannot live everywhere on the earth.
Read the lesson and match each paragraph with its main idea.
Reading-careful reading
What problems does the earth face?
the population of the world
01
02
the land people can live
deserts
Snow and ice
High mountains
The population is increasing very quickly.
PART
03
Grammar
Passive Voice被动语态
英语中动词分为主动和被动两种语态。
主动语态：动作的发出者。 被动语态：动作的承受者。
我教你们。 你们由我来教。
I teach you. You are taught by me.
他拿走了那本书。 那本书被他拿走了。
He took away that book. That book was taken away by him.
Passive Voice被动语态
总结：主动语态句子变成被动语态句子哪三个部分要变？怎么变？
We cleaned the room. (主动）
The room
was cleaned
by
us.
（被动）
Passive Voice被动语态
例句（主动）
例句（被动）
时态
被动语态构成
The classroom is cleaned by us.
一般现在时
am/is/are+done
The kite was made by him.
一般过去时
was/were+done
Trees will be planted tomorrow.
一般将来时
will+be+done
He can be found by me.
含有情态动词
情态动词+be+done
We cleaned the classroom.
He made the kite.
(We) will plant trees tomorrow.
I can find him.
Practice
Many people visit the Great Wall every year. （变为被动）
The Great Wall by many people every year.
is visited
Li Bai wrote many famous poems. （变为被动）
Many famous poems by Li Bai.
were written
The rabbit will be caught by the dog. （变为主动）
The dog will the rabbit.
catch
My homework was finished last night. （变为主动）
I my homework last night.
finished
Practice
1. The Spring Festival ________ in January or February.
A. celebrates B. is celebrated
C. celebrated D. was celebrated
2. Annie _________ to the party . She had a wonderful time with us.
A. invites B. is invited
C. was invited D. has invited
3. We should take good care of the children.
→The children should ________by them.
A. be taken good care B. be taken good care of
C. take good care of D. take good care
B
C
B
PART
04
Exercise
Exercise
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
根据首字母或汉语提示，完成单词。
1. The biggest ocean in the world is the P_______Ocean.
2. Almost everyone knows the e_____ goes around the sun.
3. Deserts may cover three _________ (百分比) of the earth's surface.
4. The population of the world is __________ (增长) quickly.
5. Hainan is the second-largest _________ (岛屿) in China.
6. After half a month at sea, we saw ____(陆地).
land
arth
percent
increasing
island
acific
Summary
Words: planet; billion; total; increase; surface; Indian; Atlantic; Arctic
Phrases: in total; one third; be covered with; two thirds
Sentences:
These dry places are called deserts.
Antarctica is covered with snow and ice all year round.
Oceans cover two thirds of the earth’s surface.
Homework
Copy the words, phrases and sentences on the exercise book.
Finish workbook 《轻松学英语》
Review this lesson and preview next lesson.
Thank you!