Unit20Theworldspopulation

更新时间:2023-06-01 05:18:35 阅读: 评论:0

Unit20Theworldspopulation
1. 本单元主要谈论世界人口问题。人口问题是当今世界最重要的问题之一。让学生了解其重要性,从而培养学生关心世界、关心未来的高尚情操。
2. 学习过去将来时态在宾语从句中的运用。
3. 学习数词及其读法。
【重点、难点概览】
一、词汇与短语:
on the earth, hour after hour, mouth, grow ( grew, grown), beginning, at the beginning of, by.家长代表发言
二、句型与日常交际用语:
中国结手链1.What’ s the population of… ?
2.It’ s about 1. 2 billion.
3.What does…mean?
4.That means…
三、语法:
数词的读法
理解过去将来时在宾语从句中的运用和was/were going to的用法。
重点难点解析
本单元语法重点是过去将来时态和数的读法。
1. 过去将来时态
1)过去将来时由“助动词would+动词原形”构成。would常简缩为’d,如:I'd , you'd ,
he 'd等;would not常简缩为wouldn't。
狗插27. 过去将来时的用法
过去将来时表示从过去的某一时间看来将要发生的动作或存在的状态。过去将来时常用在宾语从句中。例如:锁钥
I didn't know if he would come.
He wasn't sure whether she would go with him.
Mr Hu said he would go to Beijing for summer holiday.
过去将来时态也可用“was/were going to +动词原形”来表示,例如:
Li Lei said he was going to college after he left middle school.
I wasn't sure if he was going to speak at the meeting.
He didn't say when he was coming.
2. Numbers数及其读法
3,333,333,333 33亿3千3百 33万3千3百33
黑巧克力的功效读多位数注意以下各点:
1) 1,000以上的大数,要使用计数逗点“,”,即从个位开始,每隔三位加一逗点,第一个逗点前是thousand(千),第二个逗点前是million(百万),第三个逗点前是thousand million(英国读法)或billion(美国读法)(十亿)。
2) 分段以后,各段就都成了101-999等三位数了。读的时候十位数(或个位数)的前面一般要加and(也可不加)。因此,333,333,333就可读作:
333,000,000 three hundred (and) thirty-three million
333,000 three hundred (and) thirty-three thousand
333 three hundred and thirty three
3) 英语没有单独表示“万”和“亿”的词,以“ten thousand”表示“一万”,“几十thousand”表示“几万”,“几百thousand”表示“几十万”。从“ten million”表示“一千 万”,“几十million”表示“
几千万”,以“a hundred million”表示“一亿”,几百 “million”表示“几亿”。
例如:5,893,421,678 58亿9千3百42万1千6百78 读作:
five billion , eight hundred and ninety-three million , four hundred and twenty -one thousand , six hundred and venty-eight。
核心知识
1.数字的读法:
注意要点:(1)十位数前一般加and,十位与个位间加“-”.
(2)数词在表示具体数字时无复数形式。
e.g:two hundred, three thousand.hundred, thousand. 等不加“s”
e.g:234: two hundred and thirty - four.
2, 345:two thousand three hundred and forty - five
2, 345, 678: two million, three hundred and forty - five thousand, six hundred and venty- eight.
2.过去将来时:
用法:过去将来时表示从过去的某一时间看来将要发生的动作或将要存在的状态。
过去将来时常用在宾语从句中。
构成形式:would+动词原形。
或 was/were + going to do.
e.g:He said that he would come next week.
He told me that he was going to e his parents.
3.What’ s the population of China?中国有多少人口?
population:指“人口”,谓语动词用单数。可用large,small修饰
population.
e.g:China has the largest population in the world.华为手机刷机教程
中国的人口数在世界上最多。
注意区分:people:“人们”,表复数概念,谓语用单数。
e.g:How many pepole are there in China?中国有多少人?
4.There will be standing room only on the earth.
地球上将只剩站的地方了。
room:表“空间、地方”,作不可数名词。
作“房间”讲,是可数名词。
e. g: Can you make room for me?你能给我留点地吗?
5.So it goes on, hour after hour.
情况就这样一个小时接一个小时地继续下去。
after:前后可连接一个相同的单数名词,表一个接一个。
e.g:day after day一天又一天地。
year after day一年又一年。
time after time一次又一次。
go on:表“继续”,可接to do或doing.
Let’ s go on working. 让我们继续干吧。
After a short rest, we go on learning lesson two. 休息了一会儿,我们又继续学第二课。
6.develop: v. 发展
developing表示“正在发展中的”
developed表示“发达的,已发展的”。
e.g:China is a developing country, while America is a developed country. 中国是发展中国家,而美国是发达国家。
还可用more/less修饰developed, 表达“较发达/不太发达”如何坚持群众路线
7.A UN repost says that the world population will pass six billion by the end of the twentieth century.
一份联合国报告说,到二十世纪末,世界人口将超过60亿。
诺基亚7200by:“到……为止”。
e. g: I have learned 500 words by the end of last month.
到上个月末为止,我已学了500个词。
【常用单词积累】
population , billion , increa , wonder , size , produce , mouth , multiply , challenge , gro
w , beginning , century , square , hardly , room , space , by , cost , worth , cond hand , ud , result , price , arch , internet , download , information , chart , path , plan
slow down/slow up使慢下来,减缓population increa人口增长hour after hour一小时接一小时地produce food生产粮食multiply…by…把……和……相乘grow faster and faster增长得越来越快at the beginning of在……初期/开始的时候standing room only只有立足之地as little as 少则as much as多则prefer…rather than 喜欢……胜过worth more than two million Yuan值两百多万元for holiday度假be busy doing sth. 忙于做arch the internet网上查找资料/查英特网become interested in对……产生兴趣download the information从网上下载信息make a chart画一幅航线图start with从……开始end with在……结束travel path=the path of travel旅程/旅游线路
【基础知识精讲】
1. What's the population of Germany?德国有多少人口?或德国的人口是多少?
回答是:The population of Germany is about eighty-two million.
问人口有多少还可以说:
How many people are there in Germany?
回答是:There are about eighty-two million people in Germany.
the population of Germany德国的人口。
再如:
the world's population=the population of the world世界人口
2. I don't know if it will increa. 我不知道它(人口)是否还会增长。

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