人教版七年级英语上册Unit7 SectionB1a-1e课件（共有PPT11张，无音频）

(共11张PPT)
Section B (1a- 1e)
1a
10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30 31
Let's repeat!
Row 1: ten___ eleven___ twelve___ thirteen___
fourteen___
Row 2: twenty-five____ twenty-six_____ twenty-seven___
twenty-eight____ twenty-nine___
Row 3: twenty____ twenty-one____ twenty-two___
twenty-three___ twenty-four____
Row 4: fifteen______ sixteen______ seventeen______
eighteen_______ nineteen_____
Row 5: thirty____ thirty-one_______
10
11
12
13
14
25
26
27
28
29
20
21
22
23
24
15
16
17
18
19
30
31
1b
10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30 31
Which two rows of numbers are in the wrong places
Let's write !
哪两行数字在错误的位置？
1c
10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30 31
Let's circle（画圈） !
Kate’s mom
Kate
What clothes do Kate and her mom talk about Circle.
What does Kate buy at last Check ( ).
1d
Let's shop.
Listen again, and complete the conversation.
Mom: Oh, look! I like that blue sweater. _____ _____ 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 _____ _______
Mom: It’s ______ dollars. But you have a green sweater.
Kate: Mmm.
Mom: Oh, do you like these _______
Kate: Oh, yes. How much ____ ____
Mom: Only _______ dollars.
Kate: OK, ____________.
much
red
How
Fifteen
socks
T-shirt
eleven
green
sweater
twenty
trousers
are
they
sixteen
I’ll take them
Language points
1. 基数词
（1）定义：表示数量的词叫基数词。
（2）基数词的表达。
①0~12的基数词在拼写时要分别记忆。②13~19表示“十几”的词，要在个位后直接加teen。
例如：14-fourteen, 16-sixteen, 17-seventeen, 19-nineteen。
要个别记忆的有：13-thirteen, 15-fifteen, 18-eighteen。
③20~90表示整十的基数词要在末位数后加?ty，但有些数应注意其拼写。
例如：20-twenty, 30-thirty, 40-forty, 80-eighty, 90-ninety。
④从21~99表示“几十几”的词，中间用连字符把十位数和个位数连起来。
例如：21-twenty?one, 25-twenty?five, 89-eighty?nine。
⑤表示百位或百位以上的词，通常在百位和十位间用and连接，十位和个位之间用连字符。
例如: 156-one hundred and fifty-six
（3）基数词一般和可数名词连用，表示两个或两个以上事物的名词用复数形式。
__
_______ hundred
____ hundred and
个位
十位
__
__
个位
1. 1—12: (记住每个单词)
2. 13—19: -teen (thir-, fif-, eigh-)
3. 20—90: -ty (twen-, thir-, for-, fif-, eigh-)
4. 21—99:
5. 100—900:
6. 101—999:
基数词的记忆方法:
__
十位
个位
1-9
Exercise
判断下列算式正误 (T/F) 。
(　　) 1. twelve + eight = twenty
(　　) 2. seven + eight = fifteen
(　　) 3. thirty-one + seven = twenty-five
(　　) 4. eleven + twenty = thirty-one
(　　) 5. twenty-four + nine = thirty-two
T
T
F
T
F