Topic 2 What has happened to the population? sectionb

夏邑县济阳初中九年级英语教学案
课 题：Unit1 Topic2 SectionB
班级： 学生姓名：
自学——质疑——解疑
学习目标：
1、学习population的相关表达及千位数以上的基数次的表达法。
2、进一步介绍中国及世界人口问题必然引起我们对人口问题的思考，突出本话题的主题。
自学方法：
1、预习P11~12的生词和短语。
2、大声朗读1a对话，找出对人口问题的表达方式，注意2a部分千位数以上的基数次的表达法。
自测——互查——互教
翻译下列短语
1、a repot on population in the newspaper
2、发展中国家
3、发达国家 4、What’s more
5、So it is 6、carry out
展示——反馈——导学
1.And it is increased by 80 million every year.
(1). increase by 增加了，增长了
The price of apples increased by 2% .
(2). Increase to 增加到
The number of the students in our school has increased to 1800.
2.China has already carried out the one-child policy to control the population.
carry out “执行”
We don’t want to carry out this plan.
carry on sth./ carry on doing sth. 继续做某事。
3. So it is.的确是这样。
So+主语+be/助动词/情态动词，表示对上文情况的肯定、同意，意为“确实如此”。如
-John studies very hard.
-So he does.
-John can speak English.
-So she can.
4. 6004001 读作six million four thousand and one
表达千位以上的基数词以三位数字为单位，从后向前用逗号依次隔开，第一个逗号用thousand 表示，第二个逗号用million第三个逗号用billion表示。逗号之间的数字按百位数的表达法来表示。
5. A.对话表演
B.展示自我收获
6.小组合作完成1b, 2a ,2b练习。
自测——反馈——点拨
单项选择
（ ）1. — The population of this city has increased _______twelve million.
A. to B. for C. by D. on
( ) 2. ---There are _______students in our school.
A. three thousands B. three thousands of C. three thousands of D. three thousand
（ ）3. Brazil is a country _______a population of 184 million..
A. and B. with C. have D. has
( )4 The population has increased _______15 percent.
A. to B. into C. by D. on
( )5 The weather in China is different form ________in Australia.
A. that B. one C. it D. /
( ) 6.-The weather is fine.
-So ______________.
A. is it B. it is C. it does D. does it
自测——反馈——点拨
根据汉语或首字母提示完成句子。
1.The i_________population has become one of the most serious challenges in the world.
2. He had a traffic accident. L_________, he wasn’t hurt badly.
3. It is necessary for us to __________(执行)this plan at once.
4.Our country is still a ____________(发展中国家)。We should try our best to study and make her more developed.
5.Do you know the r__________situation of Jane I lost touch with her.
回顾——总结——反思