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(共14张PPT)
Unit 4 Inventions
主题范畴：
人与社会
主题群：
科学与技术
子主题：
科学技术与工程，人类发明与创新
Key question
What makes an invention great
talk about an interesting invention;
use the rising tone appropriately.
Learning objectives 学习目标
At the end of the class, I’ll be able to:
Guess what the invention is.
Lead in
This invention can help people do some daily work.
It is helpful for housewives. The machine can move something that you put into it. It needs soap and water to wash something in it.
Washing machine
It allows you to get a likeness of an object. When you press the button, it works. When a flash happens, it will copy a scene onto a film.
When the film is developed, the scene you copy appears on a paper-like thing.
Camera
How do people come up with ideas for new inventions
Speaking
Talking about an interesting invention
Find an interesting invention and then discuss it in pairs.
What is the invention and who invented it
Why did he / she invent it
What does it look like
How does it work
S1: What is that invention in the picture
S2: It is a pedal-powered washing machine.
S1: Who invented it
S2: A 14-year-old girl from India invented it.
S1: How does it work
S2: When you ride the bicycle, it moves the clothes around the washing machine.
Intonation is a very powerful phonetic rule. By changing intonation, you can change the meaning of your sentence.
the rise and fall of the voice in speaking
Improving your pronunciation
Do you understand ↗
Can you repeat it ↗
Is it correct ↗
Can I ask you some questions ↗
Do you remember what we learnt yesterday ↗
Do you know the comparative form of the word “far” ↗
Try to read the following sentences.
What do they have in common
How to read them correctly
Intonation (1): Rising tone
When we ask a Yes / No question, our tone rises (↗) at the end of the question.
Listen and repeat. Try to make sure your tone rises at the end of each question.
Wendy: I’m going to talk about an important invention. You can ask five Yes / No questions. Can you guess what it is ↗
Tony: Do we have it in the classroom ↗
Wendy: Yes.
Tony: Do I have it in my school bag ↗
Wendy: Yes.
Tony: Is it a pen ↗
Wendy: Yes. You’re right.
1. 用于一般疑问句 (Yes/No question)；
Do you understand ↗
Can you repeat it ↗
Is it correct ↗
注意：一般疑问句有时也可用降调，表示一种不耐烦的口气，或表示命令等。
Are you satisfied ↘
Will you take off your hat, please ↘
Rising Tone 升调
相关拓展
2. 用于罗列中的最后一项之前的各项；
For each incomplete sentence, there are four choices marked A↗, B ↗, C ↗, and D ↘.
We study Chinese ↗, History ↗, Geography ↗, and English ↘.
3. 用于陈述句，表示疑问、怀疑、未定、猜测或期待等。
You really want to do it ↗
She might have gone. ↗
I think so. ↗
tips
Are you going to visit your grandparents this weekend
Did they finish preparing for the important exam yesterday
Is the new library going to open to the public next month
Will the school organize a big event at the stadium
Have you already made plans for the summer vacation
Practice
Read the following sentences with the correct intonation.
1. Finish the exercises.
2. Read the conversations in previous units.
Pay attention to your intonation.

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