Unit 1 Topic 2 Section B 课件 2.ppt

1、Unit 1 The Changing World,Topic 2 The population in developing countries is growing faster. Section B 课件 2,Look, read and learn,1,000,000,000 one billion,1,000,000 one million,1,000 one thousand,3.14 three point one four,100 one hundred,543.7 five hundred and forty-three point seven 1 562 one thousa

2、nd, five hundred and sixty-two 6 004 001 six million, four thousand and one 7 198 764 502 seven billion, one hundred and ninety-eight million, seven hundred and sixty-four thousand, five hundred and two,973 nine hundred and seventy-three 3 980 three thousand , nine hundred and eighty 98 721 ninety-e

3、ight thousand , seven hundred and twenty-one 768 540 seven hundred and sixty-eight thousand , five hundred and forty,2 346 780 two million, three hundred and forty-six thousand, seven hundred and eighty 82 346 580 eighty-two million, three hundred and forty-six thousand, five hundred and eighty 405

4、000 000 four hundred and five million 5 555 555 555 five billion, five hundred and fifty-five million, five hundred and fifty-five thousand, five hundred and fifty-five,1b Listen to 1a and match the information.,Make similar conversations after the example.,Example: A.: Whats the population of the w

5、orld? B: Its about 6.8 billion.,1c Read 1a and fill in the blanks.,The world has a population of 6.8 billion and it is increasing by _ every year. _ has the largest population. It has already reached _ and India is _ with 1.1 billion. The population in developing countries is _ and is growing _ than

6、 that in developed countries. Luckily, our country has carried out the _ policy to control the population.,80 million,China,1.3 billion,second,larger,faster,one-child,The supermarket is very crowded.,So it is.,So +主语+ be/情态动词/助动词,Lucy dances very well.,She has cleaned the room.,So she does.,So she h

7、as.,So it is.,确实如此。,两个句子的主语是同一个人！,Learn by heart:,Practices,Choose the best answer.,C,1. - _ is the population of Russia? - 143 million. A. How much B. How many C. What D. How,2. There are _ students in our school. A. three thousands B. three thousands of C. three thousand of D. three thousand,D,3.

8、- Jenny always helps others. - _. A. So is she B. So she is C. So does she D. So she does,D,4. The population of China is _ than that of Japan. A. larger B. more C. fewer D. less,A,5. There are sixty teachers in our school. _ of them are women. A. Two third B. Two threes C. Two thirds D. Second thre

9、e,C,6. Hes read this book before, _? A. hasnt he B. doesnt he C. isnt he D. wasnt he,A,7. The _ population has caused many serious problems. A. increase B. increased C. increasing D. increases,C,Points,1. population意为人口、居民，常用形容词large或small来表示人口的多少。 China has the largest population in the world. 中国拥有

10、世界上最多的人口。 注: 常用句式：Whats the population of.? 意为“人口是多少？” have a population of. 意为“有人口” e.g. China has a population of 1.3billion. 中国有13亿人口。,e.g. The population of this city is nearly 300 000. 这个城市的人口将近三十万。 e.g. 80% of the population in China are farmers. 中国百分之八十的人口是农民。,e.g. The population of China is

11、very large. 中国人口众多。 The population in this area is becoming smaller and smaller. 这个地区的人口越来越少。,强调人口的具体分布或构成 (作复数）,population,集合名词 某地整体人口的数量(作单数）,通常用large/ big/ small 来修饰。,2. increase v. (使)增加，（使)增大，增多。 increase by倍数或百分数， 表示“增加了倍或百分之”。 e.g. Compared with last year, our pay has increased by three times

12、. 与去年相比，我们的工资增长了3倍。,increase to具体的增长后的数字，表示“增加到了”。 e.g. Our rice output has increased to 6 million tons this year. 我们的水稻产量今年增长到了600万吨。,increase by + 数字 / 倍数 / 百分数 增加了 e.g. The price of the house has increased by three times. increase to +数字 增加到 e.g. The price of the house has increased to 500 000.,2

13、50,250,250,250,250,250,500,3. carry out 实行，进行，执行。 e.g. It wont be an easy plan to carry out. 那并不是一个容易实施的计划。 e.g. This is a new policy, and they will carry it out next year. 这是一项新政策，他们将在明年实施它。,carry out 实行, 进行, 执行 (e.g.) We will carry out a new plan to improve our English. carry + 代词 +out (e.g.) Its

14、easy to carry it out.,Summary,1. Read numbers in English. 2. Talk about population problems.,1. Some words: cinema, department, nearby, population, billion, increase, reach, luckily, policy Russia, measure , 2. Some phrases: increase by, developing countries, developed countries, carry out, the one-child policy 3. Some sentences: What a lar