(共28张PPT)
外研版 五年级上册
Module 5
Unit 2 There are forty.
Lead in
What numbers can you see
Numbers are having a party.
Twenty, thirty, forty, fifty,
sixty, seventy, eighty and ninety.
All of them are dancing happily.
number（复数）numbers
have a party
举行聚会
happy happily
（形容词）高兴的，幸福的 （副词）幸福地，愉快地
变 y 为 i ，再加 -ly
Let’s chant
整十数基数词20-90的构词规律
整十数基数词20-90有一定的构词规律，它们都以-ty结尾。
Grammar
twenty 20 thirty 30 forty 40 fifty 50 sixty 60 seventy 70 eighty 80 ninety
90
注意：twenty，thirty，forty，fifty和 eighty的拼写。
整十数字有规律:twenty，thirty，fifty变换字母特殊记;
forty和eighty删减字母容易记；
sixty，seventy和ninety更好记，
six，seven，nine加后缀-ty就可以。
Grammar
整十数基数词20-90的构词规律
基数词“几十几”也很简单,由“整十数＋个位数”构成，中间用连字符
“ - ”连接。
twenty-one 21 32 43 54
55
65 76 87 98
99
thirty-two
forty-three
fifty-four
fifty-five
sixty-five
seventy-six
eighty-seven
ninety-eight
ninety-nine
15+15=
20+20=
13+52=
30+40=
21+65=
44+53=
forty
sixty-five
seventy
eighty-five
ninety-seven
thirty
Let’s read
What are they talking about
1. Are there fourteen pupils in Lingling’s class
2. How many pupils are there in Lingling’s class
No, there aren’t.
There are forty pupils.
Let’s learn
There are fourteen.
Oh sorry. There are forty.
Oh, there are so many!
How many pupils are there in your class, Lingling
Fourteen
如此多，这么多
fourteen
forty
多少（后跟可数名词复数）
Let’s read
twelve
twenty
thirteen
thirty
fifteen
fifty
sixteen
sixty
seventy
seventeen
eighteen
eighty
nineteen
ninety
Practise
A: There are seventy pupils in Lake School（湖泊学校）.
B: There are ninety pupils in Park School（公园学校）.
Lake School
Park School
70 pupils
90 pupils
30 boys
40 boys
40 girls
50 girls
20 computers
30 computers
A: There are in Lake School（湖泊学校）.
B: There are in Park School（公园学校）.
Let’s read
Listen and repeat.
air, ear
chair
pear
ear
ear
dear
ou, ow
house
flower
Let’s read
Let’s read
字母（组合）ou, ow 在单词中的发音
ou, ow
cloud
cow
brown
Let’s read
字母（组合）ear 在单词中的发音
ear
hear
beer
near
Let’s read
字母（组合）air, ear 在单词中的发音
air, ear
hair
pear
swear
Ten big lions at the zoo.
Twenty bears（熊） and a kangaroo（袋鼠）.
Thirty elephants in a row.
Forty monkeys go high and low.
Fifty tigers I can see.
Sixty parrots（鹦鹉） in the tree.
Seventy cats and eighty dogs.
Ninety birds and one hundred frogs（青蛙） .
在动物园
排成一排
上蹿下跳
一百
Let’s chant
Let’s chant
Let’s play
Count and say.
One dog.
Four legs.
Three dogs.
Twelve legs.
Let’s play
One parrot.
Two legs.
Twenty parrots.
Forty legs.
Let’s play
One rabbit.
Four legs.
Four rabbits.
Sixteen legs.
Let’s write
Make a survey of families.
Name How many people
Xiaowen
...
How many people are there in your family
There are ...
people（复数）people
Exercise
一、选出每组中画线部分读音不同的单词。
1.A. bear B. ear C. dear
2.A. house B. follow C. flower
3.A. here B. where C. pear
4.A. bag B. day C. play
5.A. chair B. pear C. near
Exercise
二、仿照示例写单词。
示例：two — twelve — twenty
1. four — fourteen — ( )
2. eight — ( ) — eighty
eighteen
forty
Exercise
3. nine — ( ) — ninety
4. seven — ( ) — seventy
5. ( ) — thirteen — thirty
6. five — fifteen — ( )
seventeen
nineteen
three
fifty
Exercise
三、照例子，找规律写句子。
A: There is one dog.
B: One dog has four legs.
A: There are two dogs.
B: Two dogs have eight legs.
示例:
Exercise
A:______________________
B:______________________
A:______________________
B:______________________
There is one bird.
One bird has two legs.
There are two birds.
Two birds have four legs.
Homework
Read and recite the dialogue of activity 2.
完成英语活动手册本课时相关练习。
Homework
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