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

课件27张PPT。Lesson 38The World Is a Big Place!THINK ABOUT IT
How many continents are there in the world? What are they?
What do you know about the place where you live.AfricaAsiaNorth 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planet
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
n. & adj. 大西洋(的)
n. & adj. 北极的一填一填
1.in the year 2010
2.in total
3.by 2050
4.on the earth
5.三分之一
6.被…覆盖
7.一年到头
8.肥沃的土地在2010年
总计
到2050年
在地球上
one third
be covered with…
all year round
rich land二.根据汉语提示补全句子
1.在2010年，世界人口总计超过70亿
In the year 2010,the world’s population was over 7 billion in total.
2.这些干燥的地方被称为沙漠
These dry places are called deserts.
3.南极洲一年到头被冰雪覆盖
Antarctica is covered with snow and ice all year round.4.海洋覆盖了地球的三分之二
Oceans cover two thirds of the earth’s surface.
5.为了我们的孩子，也为了我们的孩子的孩子，我们必须好好对待地球.
It must be treated well for our children and for our children’s children ,too.Read 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 .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)：Time for Reflection Homework
1.本课短语
2.课后第二题
3.预习下一课