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(共25张PPT)
Unit 7 How much are these socks
人教版七年级上 册
Section B (1a-1e)
Learning objectives
Key words & phrases :
ten; eleven; twelve; thirteen; fifteen; eighteen; twenty; thirty.
Key sentences:
1. —How much is the green sweater
—It’s twenty dollars.
2.—How much are they
—Only sixteen dollars.
To learn to count the numbers over 10 and find out the rules.
Warming-up
Let's enioy a song !
Presentation
1a
Listen and repeat.
ten eleven twelve thirteen fourteen
fifteen sixteen seventeen eighteen nineteen twenty
twenty-one twenty-two twenty-three twenty-four
twenty-five twenty-six twenty-seven twenty-eight
twenty-nine thirty thirty-one
Numbers
Can you read these numbers？
(1) 1—12 独立成词.
（1）0-12：没有规律，需逐一记忆。
one
two
three
four
five
six
seven
eight
nine
ten
eleven
twelve
Rules
基数词
(2) 13 —19 以-teen结尾.
13 — thirteen
15 — fifteen
18 — eighteen
19 — nineteen
14 — fourteen
16 — sixteen
17 — seventeen
（2）13-19：表示“十几”, 在个位数词后加-teen。
注意特例:thirteen, fifteen, eighteen
Rules
基数词
60 — sixty
70 — seventy
80 — eighty
90 — ninety
(3) 表示“整十”的20—90 以--ty结尾.
20 — twenty
30 — thirty
40 — forty
50 — fifty
（3）20-90：表示“整十”, 在2-9后加-ty。
注意特例:twenty, thirty, forty, fifty, eighty
Rules
基数词
22
33
thirty-three
44
forty-four
55
fifty-five
99
ninety-nine
twenty-two
21
twenty-one
(4) 21—99 中间有连字符“-”.
（4）21-99：表示“几十几”，由“几十”的单词加
上1-9的单词构成，中间用连字符“-”连接。
Rules
基数词
基数词，不难记, 找出规律就容易。
零至十二形各异, 一个一个单独记。
后加-teen变 “十几”, thirteen, fifteen看仔细；
eight原本就有t, 只加-een莫忘记。
“整十”末尾-ty觅, twenty不同重点记;
forty没u记心里, eighty不能双写T。
表示数字 “几十几”, 连字符号别丢弃。
基数词记忆口诀
1b
Write the numbers in 1a next to the correct words. Which rows of numbers are in the wrong places
ten ___
twenty-five ___
twenty ___
fifteen ___
thirty ___
eleven ___
twenty-six ___
twenty-one ___
sixteen ___
thirty-one ___
twelve ___
twenty-seven ___
twenty-two ___
seventeen ___
thirteen ___
twenty-eight ___
twenty-three ___
eighteen ___
fourteen ___
twenty-nine ___
twenty-four ___
nineteen ___
10
11
12
13
26
29
14
25
27
28
20
21
22
23
24
15
16
17
18
19
30
31
Row 2 should be row 4; row 4 should be row 2.
1c
Listen and circle the numbers you hear in 1a.
1d
Listen again. Circle the things in the picture that Kate and her mom talk about. Check (√) the thing Kate buys.
√
Listen again. Complete the conversation.
Mom: Oh, look! I like that ____ sweater. How much is it
Kate: _______ dollars. Oh, I like these _____.
Mom: Oh, no. I don't like ___.
Kate: Do you like this _______
Mom: Mmm, Yes, I do. but it's ______ dollars.
Kate: Oh, How much is the green _______
Mom: It's ______ dollars. But you ____ a green sweater.
Kate: Mmm.
Mom: Oh, do you like these ________
Kate: Oh, yes. How much are they
Mom: Only _______ dollars.
Kate: OK, I'll take them.
blue
Fifteen
socks
red
T-shirt
eleven
sweater
have
twenty
trousers
sixteen
1e
Ask and answer questions about the things in the picture.
How much is the white bag
It's seventeen dollars.
Practice
Pair work
How much are the blue trousers
They are sixteen dollars.
Pair work
How much is that white T-shirt
It’s eleven dollars.
Pair work
How much are the blue trousers
They are sixteen dollars.
Language points
1) 表示数量，置于名词前。
2) 表示编号，置于名词后。名词和基数词首字母通常大写。
e.g. I have five apples. 我有五个苹果。
e.g. I'm in Class Two, Grade Seven. 我在七年级二班。
基数词的用法
数词是表示数量或顺序的词， 可分为基数词和序数词两种。 表示数目多少的词叫基数词， 如one, two, three等。 基数词可指代或修饰可数名词。
3) 表示号码。
4) 表示年龄。
5) 表示时间。
6) 表示计算。
e.g. My phone number is 23***271. 我的电话号码是23***271。
e.g. My father is forty now. 我的爸爸四十岁了。
e.g. It's eight twenty now. 现在是八点二十分。
e.g. Five and three is eight. 五加三等于八。
翻译下列短语。
11个篮球 __________________________
14个西红柿 ________________________
23件衬衫 __________________________
28只红袜子 ________________________
35顶帽子 __________________________
1
2
3
4
5
eleven basketballs
fourteen tomatoes
twenty-three shirts
twenty-eight red socks
thirty-five hats
Exercises
1. — 这双红色的袜子多少钱？
— 12美元。
2. — 那件白色的毛衣多少钱？
— 26美元。
— How much are the red socks
— They’re twelve dollars.
— How much is that white sweater
— It’s twenty-six dollars.
翻译下列对话。
Homework
1.Review the new words and expressions in this period.
2.Do the exercises in students’ book.
3.Make up a new conversation about buying things in the store.
谢谢
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