外研版（2019）必修第三册Unit 3 The world of Science Using language 课件(共22张PPT)

(共22张PPT)
Unit 3　The world of science
Using language
Compare sentences a&c with sentences b&d and answer the 2 questions.
a. I guess you have been asked about the title of your book before.
b. New inventions like 3D printers have been used to make replacement hearts and bone parts.
c. I guess someone has asked you about the title of your book before.
d. People have used new inventions like3D printers to make replacement hearts and bone parts.
1:What is the difference between the two groups of sentences (Pay attention to the subject &predicate)
2:Why does the author choose to use sentence a&b instead of sentence c&d in the reading passage
a. I guess you have been asked about the title of your book before.
b. New inventions like 3D printers have been used to make replacement hearts and bone parts.
c. I guess someone has asked you about the title of your book before.
d. People have used new inventions like3D printers to make replacement hearts and bone parts.
1:What is the difference between the two groups of sentences (Pay attention to the subject &predicate)
2:Why does the author choose to use the passive form instead of the active form in the reading passage
They have different subject and predicate.
sentence a&b: passive voice sentence c&d :active voice
To emphasize/stress the receiver of the action.
Now look for more sentences with the present perfect passive in the reading passage.
1. I’ll be talking to Dr Richard Fairhurst, whose new book The New Age of Invention has just been published.
2. I guess you have been asked about the title ... before.
3. In addition, important advances have been made in medicine and ... power.
4. New inventions like 3D printers have been used to make replacement hearts and bone parts.
5. I have also been told that you’re an inventor yourself.
6. Nothing like thishas been invented yet and I’d say we’re a long
way from an invention like that at the moment!
回顾文本, 用所给词正确形式完成下列句子,体会句中使用的时态和语态。
1. This evening, I’ll be talking to Dr Richard
Fairhurst, whose new book The New Age of Invention
___just _____ _________(publish).
has
been
published
我想你以前已经被问过关于你的书题目的问题。
2. I guess you _____ _____ _____(ask) about the title
of your book before.
___________________________________________
have
been
asked
我想你以前已经被问过关于你的书题目的问题。
3. In addition, important advances _____ _____ _____
(make) in medicine and environmental science thanks
to increasing computer power.
_______________________________________________
_____________
have
been
made
此外, 由于计算机能力的提高, 医学和环境科学也取得
了重要进展。
4. New inventions like 3D printers _____ _____ ____
(use) to make replacement hearts and bone parts.
_____________________________________________
_______________
5. I _____also _____ ____(tell) that you’re an inventor
yourself.
_________________________________
have
been
used
像3D打印机这样的新发明已经被用来制造替换的心
脏和骨骼部分。
have
been
told
我也被告知你本人就是一位发明家。
6. Nothing like this ___ _____ ________ (invent) yet
and I’d say we’re a long way from an invention like
that at the moment!
______________________________________________
___________________________
has
been
invented
还没有像这样的东西被发明, 而且我得说目前我们离
这样的发明还有很长一段路。
将主动语态改成被动语态：
1:I guess someone has asked you about the title of your book before.
I guess you have been asked (by someone) about the title of your book before.
New inventions like 3D printers have been used by people to make replacement hearts
and bone parts.
People have used new inventions like3D printers to make replacement hearts and bone parts.
主动语态变被动语态口诀：
宾语提前主语变，
原主变宾by后见，
时态人称be关键。
现在完成时的被动语态
1:意义：现在完成时的被动语态强调过去的动作对现在造成的影响或结果, 但主语为动作的承受者, 表示“……已经被……”。
2：结构：基本结构“主语+have/ has been done”
否定式: have/ has not been done。
一般疑问句形式：Have/ Has+ 主语+ been done。
特殊疑问句形式: 特殊疑问词+ have/ has been done。
3：使用情况：
1）：不知道或没有必要说明动作的执行者
2）:强调动作的承受者，而不强调动作
3）:动作的执行者很模糊
4）:有时为了礼貌的需要，避免说出动作的执行者
4：标志词：
通常与 already,yet, just, never, recently，up to now,until now ,so far,in the past/last+时间段等连用。
【即学活用】
(1)The experiment ___ _____ _____successfully.
这个实验做得很成功。
(2)The books _____ ___ _____ _________by the
students. 那些书还没有被学生们借走。
has
been
done
have
not
been
borrowed
(3)____ the sports meeting _____ ___ ___until next
Friday
运动会已经推迟到下周五了吗
(4)So even the olive wreath ___ _____ ________.
就连橄榄枝花环也被取代了。
（5）____ _____has the project been carried out
这项工程已被实施多长时间了
Has
been
put
off
has
been
replaced
How long
Rewrite the underlined parts using the present perfect passive.
Within the next 80 years, our lives may be changed beyond recognition by 3D printing. lt has already affected many things in our lives, right down to the food we eat. For instance, some restaurants in London have served3D-printed hamburgers to customers.
Many things have been already affected in our lives...
3D-printed hamburgers have been served to customers
by some restaurants in London.
But perhaps the most significant success that people have achieved to date is in medicine.
They have made human body parts, including a beating heart, with 3D printing technology. And it is not just humans who are benefiting - in Brazil, people have
given a new 3D-printed shell to a turtle injured in a forest fire!
The most significant success to date in medicine has been achieved by people .
Human body parts have been made (by them).
A new 3D-printed shell has been given (by people)to a turtle injured in a forest fire!
That’s all !