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Unit2 Amazing numbers
Section2 Grammar 语法优质课
沪教版（2024）八年级
上
Learning objectives
1
Lead in
Cardinal numbers
3
Practice
Ordinal number
5
Practice
Assessment
7
Homework
2
4
6
8
By the end of the lesson, I will be able to...
1
2
3
4
Master reading and writing of cardinal & ordinal numbers.
use cardinal numbers for quantity and ordinal numbers for order
Describe river lengths and mountain heights with these numbers.
Improve English communication about numerical info.
00
Learning objectives
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What number is this
1/16
twelve
twenty
NEXT
What number is this
2/16
eighty
eighteen
NEXT
What number is this
3/16
fourteen
forty
NEXT
What number is this
4/16
seventy
seventeen
NEXT
What number is this
5/16
sixteen
sixty
NEXT
What number is this
6/16
seventeen
seventy
NEXT
What number is this
7/16
fifty
fifteen
NEXT
What number is this
8/16
eighteen
eighty
NEXT
What number is this
9/16
twenty
twelve
NEXT
What number is this
10/16
fifteen
fifty
NEXT
What number is this
11/16
forty
fourteen
NEXT
What number is this
12/16
nineteen
ninety
NEXT
What number is this
13/16
thirty
thirteen
NEXT
What number is this
14/16
sixty
sixteen
NEXT
What number is this
15/16
thirteen
thirty
NEXT
What number is this
16/16
ninety
nineteen
EXIT
cardinal Numbers
基数词
04
We use cardinal numbers to count things.
11 eleven 15 fifteen 20 twenty 82 eighty-two
12 twelve 18 eighteen 50 fifty 98 ninety-eight
100 one hundred 385 three hundred and seventy-five
1,000 one thousand 100,000 one hundred thousand
4,189 four thousand one hundred and eighty-nine
1,000,000
2,000,000
1,000,000,000
3,000,000,000
one million
two million
one billion
three billion
A Cardinal numbers
一、基数词的概念
We use cardinal numbers to count things.
1. People from about 180 countries and areas live
in New York.
2. The CN Tower is 1,815 feet tall.
3. Red Square in Moscow is about 91,000 square
metres in size.
4. France has an area of over 26,000 square miles.
5. There are about 8,000,000 people living in
London.
6. Tokyo, the capital of Japan, has over 13,000,000
people.
0～12为基本单词：
zero one two three four
five six seven eight nine
ten eleven twelve
13～19为对应的个位数单词(或变形)后加-teen：
thirteen fourteen fifteen sixteen
seventeen eighteen nineteen
二、基数词的构成
3 three 13 thirteen
11 eleven 15 fifteen
12 twelve 18 eighteen
20～90为其对应个位数单词(或变形)后加-ty：
twenty thirty forty fifty sixty
seventy eighty ninety
21～99的两位数，十位与个位之间用连字符“-”：
26 twenty-six 99 ninety-nine
When we say thirteen, we stress the second syllable. When we say thirty, we stress the first syllable.
20 twenty 70 seventy
30 thirty 82 eighty-two
50 fifty 98 ninety-eight
100 one hundred
200 two hundred
375 three hundred and seventy-five
101～999的三位数，百位数和十位数（若无十位数则和个位数）之间用and连接，百后用单数形式：
103 a/one hundred and three
225 two hundred and twenty-five
999 nine hundred and ninety-nine
多位数：
注意每三个数为一个单位，按照百、十、个向下读。
6
,
500
,
431
,
729
billion
million
thousand
seven hundred and twenty-nine
six billion,
five hundred million,
four hundred and thirty-one thousand,
在英语中，对于万以上的数字，我们该如何表达呢？这就要记住英语数字读法特点。以下面一个数字为例：
用英语写出下列数字
44
85
101
443
2002
3，654
78,542,650
forty-four
eighty-five
one hundred and one
four hundred and forty-three
two thousand and two
three thousand six hundred and fifty-four
seventy-eight million five hundred and forty-two thousand six hundred and fifty
Work out the rule
In the cardinal numbers, we do not add -s to hundred, _________ and __________.
With large numbers, we put _________ between hundred and ten.
thousand
million
and
(1)时刻、年份的读法
8:20
10:30
11:40
2000
2021
twenty past eight
eight twenty
ten thirty
half past ten
eleven forty
twenty to twelve
two thousand
twenty twenty-one
三、基数词的用法
(2) 表示年龄：
数字+year(s)+old
1岁
90岁
one year old
ninety years old
数字-year-old+名词 (只可做定语)
一个3岁的男孩
一个五天的假期
一段15分钟的路程
a three-year-old boy
a five-day holiday
a fifteen-minute walk
(3) 表示年代：in the +整十复数(ies)
在60年代
在90年代
在20世纪90年代
in the sixties
in the nineties
in the 1990s
(4) 表示几十多岁：in one’s +整十复数(ies)
在他80多岁时
在我20多岁时
in his eighties
in my twenties
(5)公交线路编号、房间号及电话号码的读法
规则:名+数(均大写)
211路公交车
702号房
8年级
12班
第五十页
写法
Bus No. 14
Room 702
Grade 8
Class 12
Page 50
读法
Bus No. Fourteen
Room Seven Zero Two
Grade Eight
Class Twelve
Page Fifty
4,056
= four thousand and fifty-six
23,813
= twenty-three thousand eight hundred and thirteen
567,110
= five hundred and sixty-seven thousand one hundred and ten
6,425,200
= six million four hundred and twenty-five thousand two hundred
How do we say the following numbers
ORDINAL
NUMBERS
0
1 st
FIRST
2 nd
SECOND
3 rd
THIRD
FOURTH
4 th
5 th
FIFTH
6 th
SIXTH
9 th
NINTH
10 th
TENTH
11 th
ELEVENTH
12 th
TWELFTH
13 th
THIRTEENTH
15 th
FIFTEENTH
16 th
SIXTEENTH
SEVENTEENTH
17 th
18 th
EIGHTEENTH
19 th
NINETEENTH
20 th
TWENTIETH
21 st
TWENTY-FIRST
22 nd
TWENTY-SECOND
30 th
THIRTIETH
1
2
3
4
5
6
7
8
9
10
11
12
Help me, please! I’m going to the third floor
3 rd
third
Thank you!
1
2
5
4
3
6
7
8
9
10
11
12
I’m going to the fifth floor
5 th
fifth
Thank you!
1
2
9
4
3
6
7
8
5
10
11
12
I’m going to the ninth floor
9 th
ninth
Thank you!
1
9
2
4
3
6
7
8
5
10
11
12
I’m going to the second floor
2 nd
second
Thank you!
2
9
1
4
3
6
7
8
5
10
11
12
I’m going to the first floor
1 st
first
Thank you!
2
9
12
4
3
6
7
8
5
10
11
1
We’re going to the twelfth floor
12 th
twelfth
Thank you!
What floor are we on

ordinal numbers 序数词
Learn the numbers and find out the rules.
We use ordinal numbers to show the order of things.
一、序数词的概念：
Women's Day is on the eighth of March.
Our flat is on the seventh floor.
He is always the first to come to the school in our class.
1) 一般来说，是由相应的基数词加词尾th构成。
◇ four + th
◇ seven + th
◇ ten + th
2) 有些基数词在变为序数词时，有特殊的变化。
◇ one ◇ two
◇ three ◇ five
◇ eight ◇ nine
◇ twelve
→ fourth
→ seventh
→ tenth
→ first
→ third
→ eighth
→ twelfth
→ second
→ fifth
→ ninth
二、序数词的构成
3) 十位整数序数词的构成方法是将基数词的词尾y变成i，然后再加eth。
◇ twenty
◇ thirty
→ twentieth
→ thirtieth
◇ twenty-one
◇ thirty-five
◇ a hundred and fifty-three
4) 两位或两位以上的基数词变成序数词时，仅将个位数变成序数词。
→ twenty-first
→ thirty-fifth
→ a hundred and fifty-third
◇ forty
◇ ninety
→ fortieth
→ ninetieth
1) 序数词前面通常要加定冠词the，但当序数词作定语修饰名词且前面有形容词性物主代词或名词所有格时，the可以省略。
三、序数词的用法
Take the first right.
My first teacher
Lily's third boyfriend
我的第一个老师
莉莉的第三个男朋友
在第一个路口向右拐。
2) 日期可以用基数词或序数词来表示。读时前面要加定冠词the，日期前面要用介词on。
在6月1日
3) 编号可以用基数词或序数词来表示。序数词位于名词之前，前面要加定冠词the，而基数词位于名词之后，且名词和基数词的首字母都要大写。
the second part = Part Two
on June 1 / on June 1st
读作 on June the first
The students are standing in a line. They each have a number (from 1 to 28). Fill in the blanks with the cardinal numbers on the left or ordinal numbers on the right.
2
first
third
fourth
twelfth
19
twenty-third
twenty-eighth
Work out the rule
We form most ordinal numbers by adding ____ to the cardinal numbers. There are exceptions, like first, second and third.
-th
基变序，有规律，词尾加上th。一二三特殊记，词尾字母t,d,d。八加h，九减e，ve要用f替。ty要变tie，然后再加th。若是遇上几十几，只变个位就可以。
1 Look at the information about the three longest rivers in the world. Take turns asking and answering questions about the rivers.
S1: Which is the first-longest river in the world
Where is it How long is It
S2: The Nile River is the first-longest river; It’s in Africa. It’s about 6,671 km long.
S1: Which is the second-longest river in the world Where is it
How long is It
S2: The Amazon River is the second-longest river, It’s in South America.
It’s about 6,480 km long.
S1: Which is the third-longest river in the world
Where is it How long is It
S2: The Yangtze River is the third-longest river, It’s in Asia. It’s about 6,300 km long.
2 Look at the list of the highest mountains in Asia, North America and Africa Describe the mountains with cardinal and ordinal numbers.
Rank Name Height Continent
1 Mt. Qomolangma 8,848.86 m Asia
2 Mt. Qogir 8,611 m Asia
3 Mt. Kanchenjunga 8,586 m Asia
The tallest mountain in Asia is Mountain QomolangmaIt is 8,848.86 metres high
Mountain Qogir is the second-highest in Asia. It is 8,611 metres high. Mountain Kanchenjunga is the third highest in Asia. It is 8,586 metres high.
Rank Name Height Continent
1 Mt. Denali 6,190 m North America
2 Mt. Logan 5,959 m North America
3 Pico de Orizaba 5,610 m North America
The tallest mountain in North America is Mountain Denali.
It is 6,190 metres high
Mountain Logan is the second-highest in North America.
It is 5,959 metres high. Pico de Orizaba is the third highest in North America.
It is 5,610 metres high.
The tallest mountain in Africa is Mountain Kilimanjaro. It is 5,895 metres high.
Mountain Kenya is the second-highest in Africa. It is 5,199 metres high. Mountain Stanley is the third highest in Africa. It is 5,109 metres high.
Rank Name Height Continent
1 Mt. Kilimanjaro 5,895 m Africa
2 Mt. Kenya 5,199 m Africa
3 Mt. Stanley 5,109 m Africa
Assessment
08
Self-assessment
I can acquire expressions related to team activities through watching and listening activities.
I can share experiences of team activities in real - life contexts.
I can understand and recognize the importance of collaborative cooperation in team activities.
Basic (基础)
Improving(提升)
Extend (拓展)
Homework
09
默写基数词（1-100）及对应的序数词，然后大声朗读 。
熟记基数词和序数词的用法， 完成习题。
用基数词和序数词，以完整句子描述教材里尼罗河、亚马逊河、长江这三条河流的长度，以及材料中 3 座山脉的高度 。
熟记基数词和序数词的用法， 完成习题。
找一条（或一座）教材外的河流（或山脉），查询其长度（或高度），用基数词和序数词写一小段英文介绍它 。
熟记基数词和序数词的用法， 完成习题。
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