(共21张PPT)
Look at the pictures and guess :what are we going to learn
Population
Guess:
what was the population of the world in 2020
It was about 7.8 billion in 2020.
Lead in
Unit 1 The world’s population was about 7.8 billion in 2020.
Module
9
Population
noise [n z]
prepare [pr pe ]
report [r p t]
billion [ b lj n]
huge [hju d ]
increase[ n kri s , kri s]
notes [n ts]
hang on！
cause [k z]
problems[ pr bl m]
birth [b θ]
v.准备; 把…预备好
n.汇报; 报告
vt.造成; 引起;
n. 噪音; 噪声
n.问题, 麻烦
num. 十亿
稍等！
adj.巨大的
n. (pl.)笔记
n.出生
v.增长,增大；n.增长; 增大;
Pre-listening :listen and choose the correct answer.
1 What is the population of New York
a)About 17 million.
b)About 9 million.
c)About 30 million.
2 What is the population of Tokyo
a)About 4 million.
b)About 28 million.
c)About 14 million.
Activity 3 Read and complete the notes.
about 7.8 billion
about 8.5 billion
about 1.5 billion
prepare
准备一份报告
prepare sth准备某物
prepare for sth为...做准备
prepare to do sth准备做某事
世界
的人
口
攀升到
最大的人口增长
(n)在...方面增加
(v)increase by+数字，增长了
increase to+数字，增加到
发生
到...时
稍等一分钟
做笔记
人口增长太快
造成问题
例如
太多
too much+不可数名词
too many+可数名词复数
much too+adj/adv
太繁忙的交通和噪音
人口增长缓慢的国家
人口低出生率的国家
老人
谢谢你提供的信息
thanks for +名词或doing,因...而感谢某人
Read after the video and fill in the blanks.
What are the problems of fast-growing populations What are the problems of slow-growing populations
Read after the video and fill in the blanks.
What are the problems of fast-growing populations What are the problems of slow-growing populations
奔跑吧!数字!
I'm a "running number".
23 million
3 billion
8
102
13.2
5.7
5 thousand
8
102
25
thousand
5,000
,
8,742
,
thousand
5.7
point
.
131.4
.
point
million
thousand
3,000,000
,
,
123,000,000
,
million
,
thousand
million
billion
thousand
3,000,000,000
,
,
,
1. 复习1—100以内的所有数字。
2. 掌握百、千、万、十万、百万,十亿的表达法。
1、1-19的基数词：
one, two, three, four , five , six , seven , eight , nine, ten
eleven, twelve, thirteen, fourteen, fifteen, sixteen, seventeen, eighteen, nineteen.
2、20—90等十位数:
twenty 20, thirty 30, forty 40, fifty 50, sixty 60,
seventy 70, eighty 80, ninety 90
twenty-one 21, thirty-two 32 seventy-five 75 ninety-six 96
3、百、千、万
1)百 hundred 100 one hundred ; 200 two hundred 以此类推···
千 thousand 1000 one thousand ; 2000 two thousand以此类推…
英语里没有“万”这一单位，万也用thousand表示。
如：10 000 ten thousand 一万
2)101-999的三位数由“百位数＋and+两位数组成”。
如：325 three hundred and twenty-five
890
eight hundred and ninety
十万的说法是： 100,000 a (one) hundred thousand
200,000 two hundred thousand
million 百万 a (one) million 1 000 000
two million 2 000 000
billion 十亿=a thousand million.
1,000,000,000 a /one billion; a thousand million
4、十万、百万、十亿
2)三位数以上的数，从个位往前数，每三位数加一个逗号，从后往前数的第一个逗号代表thousand, 第二个逗号代表million, 第三个逗号是billion，注意这几个词不能用复数形式，后也不能加and。例如：
2,648 two thousand, six hundred and forty-eight
16,250,064 sixteen million, two hundred and fifty thousand, sixty-four
确切数目与不确切数目的表达：
1.hundred, thousand, million, billion等前面有基数词，表示确切数目时，用单数，后直接接复数名词.
如：three hundred books
one hundred people five thousand students
2.表示不确切数目时，这类词后加-s且与of连用。如： hundreds of people ; thousands of students
millions of birds ; billions of lions
Homework
must do
1.read unit1 at least 3 times
2.preview unit 2
3.copy the phrases 2 times
choose to do
make a report: describe your home town’s population.
