Unit 7 Know Our World Lesson 38 The World Is a Big Place 教学课件

课件56张PPT。Lesson 38The World Is a Big Place! To understand the text
To use the words correctly:
in total one third
be covered with… two thirdsobjectivesplanet
billion
total
in total
increase
surface
Indian n. 行星
n. 十亿；千兆
n. 总计；总数
adj. 总的；总计的
总计；合计；总共
v. 增加；增大
n. 表面；表层
adj. 印度的
n. 印度人Atlantic
Arctic
one third
two thirds
be covered with…n. & adj. 大西洋(的)
n. & adj. 北极的
三分之一
三分之二
被……覆盖How many people are there in the world?Large population1. In the year 2010, the world’s population was over ____ ______. 7 billion3.By _____, the world’s population may reach 9 billion.2.By _____, the world may have about 8 billion people.20252050AfricaAsiaNorth AmericaEuropeOceaniaAntarcticaSeven Continents (洲)South Americathe Pacific Oceanthe Pacific Oceanthe Atlantic Oceanthe Indian Oceanthe Arctic OceanFour main Oceans (海洋)大西洋太平洋太平洋印度洋北冰洋1. There are ________ continents in the world. They are _____________________ _________________________________________________.
2. There are ______ main oceans in the world. They are __________________ ________________________________ ___________________.sevenfourAsia, Europe, Africa,North America, South America, Oceaniaand Antarcticathe Atlantic Ocean, the Indian Ocean
and the Arctic Oceanthe Pacific Ocean, Which continent is covered with snow and ice all year round?AntarcticaThe Pacific OceanWhat’s the world’s largest ocean?ReadingRead the lesson and match each paragraph with its main idea.Para. 1
Para. 2
Para. 3
Para. 4
Para. 5Six of the seven continents are good for people to live on.
We should treat the earth well.
An increasing population is a big problem for the earth.
Two thirds of the earth is covered with oceans.
People cannot live everywhere on the earth.Language Points1. point out 指出2. face v. 面临，面对
n. 脸，面孔3. hundred --- thousand--- million--- billion
百 千 百万 十亿九十亿 nine billion
数十亿 billions of 4. over = more than 多于； 超过 5. in total 总计；合计；总共
a total of … 总数为…… （例）翻译：我们班总共有60人。
There are 60 students in total .
Our class has a total of 60 students .6. one third 三分之一
two thirds 三分之二
英语中分数的表达法：
先分子后分母；分子基数词，分母序数词；
分子大于一，分母用复数。注： a quarter 表示四分之一五分之二
四分之三
八分之一two fifthsthree quartersone eightheg1:我们班3/5的同学都是女生。
Three fifths of the students in our class are girls.eg2: 1/4的水在你的杯子里。
A quarter of the water is in your cup .7. be covered with 被……覆盖
cover with 在……上覆盖上……8. all year round 全年9. in the future 将来
in future 今后
= from now on
10. treat sb./sth. well 好好对待…… (例)翻译： 我们应当好好对待自己的父母亲。
We should treat our parents well .改成被动句Our parents should be treated well by us .Fill in the blanks with the correct forms of the words in the box.increase dry surface billion totalThe number of swimmers here is __________ quickly because it’s very hot these days.
The school has a _____ of 900 students.
I think it may be the ___ season of the year.increasingtotaldriestincrease dry surface billion total4. The ________ of our body is skin. It protects us.
5. How many ______ of people are there in the world now?surfacebillionsMatch the seven continents with their correct descriptions.It is the biggest continent. It has the highest point on the earth in the Himalayas. It is the second largest continent. Many elephants, giraffes, zebras and lions live there.Asia. Africa.It is the third largest continent. Canada, Mexico and the U.S. are the three major countries on this continent. It is the fourth largest continent. There are 13 countries on this continent.North America. South America.It is the third largest continent. Canada, Mexico and the U.S. are the three major countries on this continent. It is the fourth largest continent. There are 13 countries on this continent.North America. South America.It is the fifth largest continent. The South Pole is on this continent. It is the sixth largest continent. It is a good place for people to travel to.Antarctica. Europe.It is the smallest continent. You can find koalas and kangaroos there.Australia. Grammar被动语态语法讲解建议采用归纳法，如尽可能多的呈现一些相关例句，或可让学生从已学课文中找相应例句，引导学生试着从所观察到的语言现象中总结出语法规律。1) These dry places are called deserts.
2) Antarctica is covered with snow and ice all year round.
3) It must be treated well for our children and for our children’s children, too!
4) We have been asked to write a report on Asia.
5) It’s pronounced like the letter “A”.to test your sense of observation
to test your ability of short-term memory
to test your ability to highlight the language pointsGuessGuessing Game1) These dry places ___ _____ deserts.
2) Antarctica ___ _______ ____ snow and ice all year round.
3) It must ___ _______well for our children and for our children’s children, too!
4) We ____ _____ _____ to write a report on Asia.
5) It __ ___________ like the letter “A”.are calledis covered withFill in the blanks.be treatedhave been askedis pronouncedPractice1. It is said that the long bridge _________
in two months.
2. Which language ____ the most widely _______ in the world?
3. The lost boy _______________ (not find) so far.
4. Last year a large number of trees _____
_____ (cut) down.
5. The students ____ often ____ (tell) to take care of their desks and chairs.用所给动词的适当形式填空。will be builtisspokenhasn’t been foundwerecutare told以上我们已经通过归纳总结和练习对本课的语法内容有了一定的了解，下面就让我们根据
之前练习的考察情
况进一步选择讲解
该语法项的重难点。被动语态表示主语是谓语动作的承受
者，被动语态由“be + 过去分词”构成。be随着主语人称和数以及时态的不同而变化。
含有情态动词的被动语态由“can / must / may / should … + be + 过去分词”构成。被动语态Grammar
The first section of New College
English is designed for speaking practice
and is based on pictures and topics.　　
These computers were made in our own country last year.
Shall we be asked to attend the opening ceremony?　①一般现在时的被动语态：am/is/are + 过去分词
　　②一般过去时的被动语态：was/were+过去分词
③一般将来时的被动语态：will/shall+be+过去分词
1. 有些动词可以有两个宾语，在用于被动结构时，可以把主动结构中的一个宾语变为主语，另一宾语仍然保留在谓语后面。通常变为主语的是间接宾语(指人的宾语）。一些特殊的被动语态They didn’t offer Ann the job. Ann wasn’t offered the job. 2. 在使役动词have, make, get以及感官动词see, watch, notice, hear, feel, observe等后面不定式作宾语补语时，在主动结构中不定式to要省略，但变为被动结构时，要加 to。They make her clean the floor. ?She is made to clean the floor by them.3. It + be + 过去分词 + that从句 (=主语+ be + 过去分词 + to do sth.)表示：据说/据报道/据悉/据信等……据说这个男孩已经通过了这次全国性的测试。It is said that the boy has passed the
national exam.
The boy is said to have passed the
national exam.1. 某些感官动词加形容词及少数其他的动词本身可以表示被动意义。
smell, taste, prove, sell, etc.
1) The dish tastes delicious.
2) The theory proved right at last.
3) The book is so interesting that it sells
well. 不可以变成被动语态的情况need + V- ing 表示“主语承受动词发
出的动作”，表示被动意义。
我的车需要修理。
My car needs repairing.
(= to be repaired). 战争爆发了。
The war broke out.
但不能说：The war was broke out.3. 通常只有及物动词（组）才有被动语态，不及物动词没有。 “be + 过去分词”这个结构并不都是被动语态，也可能是系表结构。被动语态与系表结构主要区别是：被动结构表示一个动作，而系表结构表示主语的特点或所处的状态，试比较下面的句子：被动结构与系表结构的区别The enemy was soon surrounded by us.
The house is surrounded by trees.
She was bitten by the dog in the darkness.
I was excited by the news that my husband
got promoted.被动结构系表结构被动结构 系表结构一般现在时、一般过去时和一般将来时的主动结构和被动结构 (以动词do为例)：注：另附word文档，点此链接1. We have a lovely room. It’s one of
___in the hotel. [2011北京]
A. nice B. nicer
C. nicest D. the nicest
____ of the students are from the
countryside.
A. Third quarter B. Three quarters
C. Three quarter D. Third quarters I. Multiple choice 3. —Who has ___ marks in English，
Wang Lin, Zhang Fang or Li Hong? ---Li Hong．[2010辽宁·沈阳]　　
A. good B. better C. best D. the best
4. Hong Kong ______ to be a good place for eating today. [2010 河北]
A. knows B. knew
C. is known D. was known 5. Nick _______ a job in a bank, but to
our surprise, he didn’t take it.
(2012贵州遵义)
A. offered B. has offered
C. was offered
6. — Have you heard of Earth Day?
— Yes. The first Earth Day _______
in 1970 to educate us to protect our
planet. (2012河南)
A. celebrates B. celebrated
C. is celebrated D. was celebrated 7. More money ________ when we use both
sides of paper. (2012河北)
A. will save B. was saved
C. has saved D. will be saved
8. A new club ________ in our school at
the beginning of this year and now it has
many members. (2012陕西)
A. starts B. is started
C. has started D. was started 9. — Our classroom ________ every day.
— So it is. It’s our duty to keep it clean
and tidy. (2012福建福州)
A. cleans B. is cleaning
C. is cleaned
10. — Sixteen-year-olds ________ to drive
in China.
— But in America, they can.
(2012浙江湖州)
A. is allowed B. is not allowed
C. are allowed D. are not allowed The number of tourists has i________ greatly in recent years.
The s______ of the lake is quite still.
The film will be over ____ 9:30.
They claimed to have discovered a new p_____.
___ _______ ___ (四分之一) the students have left their pictures home.ncreasedurfacebyAquarteroflanetFill in the blanks6. The plan would save _________(数十亿) dollars in fuels each year.
7. ________ (总共), 98% of all computer users are now online.
8. The sea covers almost ____ _______ (四分之三) of the earth's surface.
9. The Nile River is the _______ river in Africa.
10. Antarctica is the world’s _____ (最干旱的) continent.billions ofIn totallongestdriestthreefourthsTime for Reflection in total
one third
two thirds
be covered with…
billions of总计；合计；总共
三分之一
三分之二
被……覆盖
数亿的Time for Reflection Homework
Review Lesson 38.
2. Write a short passage about the place where you live.Preview1. Learn the words in Lesson 39 by heart.
2. Read the text in Lesson 39 and underline the useful phrases.