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(共15张PPT)
Unit 2 Amazing numbers
主题范畴：
人与社会
主题群：
历史、社会与文化；科学与技术
子主题：
对世界、国家、人民和社会进步有突出贡献的人物；科学技术与工程，人类发明与创新
Key question
What is the role of numbers in our daily lives
know how we use numbers in daily life;
use strong and weak forms appropriately.
Learning objectives 学习目标
At the end of the class, I’ll be able to:
New words
check /t ek/ v. 检查；核查
budget / b d t/ n. 预算
Warming up
How do we use numbers in daily life
Section 3 Expressing and communicating ideas
Speaking
Using numbers in daily life
Numbers play an important role in our daily lives. Discuss how people use numbers with your classmates.
For example
S1: How do people use numbers in daily life
S2: People use numbers to do a lot of things. Take planning a journey for example. We need to decide the dates. And then we need to check the train or flight schedule. Also,
we need to make a budget.
S1: That’s true. People also use numbers to ...
People use numbers to:
· design buildings
· develop new medicine
· grow crops
· make a monthly budget
· plan a journey
...
S1: How do people use numbers in daily life
S2: People use numbers to do a lot of things. Take planning a journey for example. We need to decide the dates. And then we need to check the train or flight schedule. Also,
we need to make a budget.
S1: That’s true. People also use numbers to ...
短语收藏夹
以……为例 _____________________
设计建筑 ____________________
研发新药 _____________________
种庄稼 _____________________
制订月度预算 _____________________
计划一次旅行 _____________________
take ... for example
design buildings
develop new medicine
grow crops
make a monthly budget
plan a journey
Speaking
Improving your pronunciation
Read the sentence below and pay attention to the red word.
＊ I gave her a box of chocolates for her birthday.
strong form /f (r)/
weak form /f /
重读与弱读是两种不同的发音方式。为了使短语有节奏，常常会把句子中的一些虚词或者非重点词弱读。
Improve your pronunciation
Strong and weak form
Some words (e.g. do, the, of, and, can, for, to) have both a strong form and a weak form. Listen and read after it.
In most sentences, we use the weak forms of these words.
S1: You can’t dance.
/ju kɑ:nt dɑ:ns/
Sometimes we use the strong forms for emphasis.
He went to the hospital and visited a friend.
/hi went t 'h sp tl n 'v z t d frend/
S2: Yes, I can.
/jes a k n/
在连贯语句中（不是读单个词时），弱读是比重读更常见的现象。
在英语中大约有50个最常用的单音节词，如a, of, from, as, and等。每个词都有两种形式的读音，一种叫重读，另一种叫弱读。当读单词时，或者在连贯语句重读时用重读形式。弱读形式用于非重读的情况。
※关于弱读，首先应了解以下几点：
在连贯语句中（不是读单个词时），弱读是比重读更常见的现象。
把弱读形式读成重读形式会影响说话的流利程度，会使说话听起来没有节奏，像是读单词；也会使应该重读的词不能突出，造成交际时对方的误解。
1) 弱读形式的元音和重读形式不同。
大多数有弱读形式的单词中元音变成/ /。如: an / n/, can /k n/, of / v/, for /f / 等。
少数单词的弱读形式中，元音变成了/i/。如: he /hi/, me /mi/, the / i/（在元音前，如: the answer / i 'ɑ:ns (r)/）等。
连贯句中单词的弱读形式主要有以下几种情况:
2) 弱读形式中省略了某一个音。
省略一个元音。如: am /m/, is /z, s/等。
省略一个辅音。如: and / n/, have / v/等。
can’t
wasn’t
缩略式的否定式总是重读。如:
通常弱读的词，如果要强调它们，也可重读。如:
注意
/kɑ:nt/
/w znt/
— Can anyone here speak English
/k n 'eniw n h (r) spi:k 'i gl /
— Yes, I can.
/jes a k n/
May: Do you know the number of students in your class
Ben: Yes, I do. There are 35 students in my class—18 boys and 17 girls. I can remember all their birthdays!
Listen and repeat. Pay attention to the words in blue.
1. Read articles from unit 2 and pay attention to the weak and strong forms;
2. Finish the exercises.
3. Preview Writing on page 28-29.

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