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(共26张PPT)
人教版（2019）选择性必修二
Unit 1 Science and Scientists
Learning About Language
Build up your vocabulary
Learning objectives
By the end of this section, you will be able to:
1. use word formation to summarize and remember words;
2. use lexical chunks to express meanings;
3. grasp and practise words and expressions in context.
Find the words from the previous pages with the following prefixes or suffixes. Then add two words for each prefix or suffix, and explain their meanings.
Prefix Words Meaning Prefix Words Meaning
re- micro-
dis- trans-
remove
replace
reuse
microscope
microwave
microphone
discover
disable
disappear
transform
transport
transplant
again
not
small
complete change; through, across
Suffix Words Meaning Suffix Words Meaning
-ory -ial
-ion -ology
contradictory
advisory
compulsory
infection
action
relation
substantial
partial
financial
epidemiology
biology
sociology
of or
relating to
action or process
having the characteristics of
a branch of knowledge
Make phrases by combining the words in the left box with those on the right. Then complete the sentences using these phrases.
Many scientists _____________ the view that it is human activity that has caused global warming.
He was to ___________ the accident because he drove on the wrong side of the road.
The man _____________ being behind the robbery was seen crossing the street.
Since heart disease is often ___________ our lifestyle choices, we need to make healthy living an important part of our lives.
to of for
subscribe suspect blame link
subscribe to
blame for
suspected of
linked to
Replace the underlined parts with suitable words from the box.
It is not unusual for an athlete to be well known while he is active, and quickly forgotten when his athletic career is over.
I’m sure she’ll deal with the changes very well because she’s very adaptable.
He was ready to serve dinner to his friends when he realised that he had forgotten to turn on the oven and the meat was not cooked yet.
He used his great influence to change the thinking of the scientific community on this issue.
Scientists have collected more data than expected to prove the theory.
raw a household name substantial statistics handle
raw
substantial
statistics
a household name
handle
Read this passage about medical plete it using the words below.
British scientists believe they may have found a way to fight the common cold. It blocks a key protein in the body’s cells that is to _______ for the spread of cold-causing virus. Targeting the host rather than the _________ was a bit non-traditional but made sense because it was tricky to target the virus. Cold-causing virus are not only of _________ kinds, they also ___________ rapidly, meaning they can quickly develop resistance to medicine. Researchers are working on making a form of medicine that can be taken directly into one’s lungs, to _________ the chance of side effects. Though these scientists have made __________ advances in their research, further _______ is needed to make sure such drugs are not so _________ that they harm the body.
infection multiple decrease severe
transform proof blame substantial
infection
multiple
transform
blame
decrease
substantial
proof
severe
Discover useful structures
Learning objectives
By the end of this section, you will be able to:
1. learn the characteristics of the predicative clause and understand its function
in sentences;
2. learn the words that can introduce a predicative clause;
3. learn to use the predicative clause in context and in daily conversations.
Observation （观察）
where
The question is _________ we could get so many movies to see .
Observation （观察）
how
The cinema is very far, so the problem is _________ we get there to see the new movie .
Conclusion 推论
三、由连接副词引导的表语从句
连接副词when,where,why,how在从句中充当时间、地点、原因或方式状语。
Go and get your coat.It’s where you left it.
去把大衣拿来。就在你原来放的地方。
I had neither a raincoat nor an umbrella.That’s why I got wet through.
我既没伞也没雨衣,那是我淋湿的原因。
That is how mice ruin many stores of grain every year.
那就是老鼠每年毁坏大量粮食的方式。
Observation （观察）
as if
It looked _________ he had seen the movie quest.
Conclusion 推论
四、由连词because,as if/as though等引导的表语从句
It looked as if it was going to snow.
看起来好像要下雪了。
That’s because we never thought of it.
那是因为我们从未想过此事。
Usages of different subordinating conjunctions
that can lead a predicative clause
引导词 用法
连词 that 在从句中不充当成分，无意义
whether 在从句中不充当成分，意为“是否”
连接代词 what(ever),which(ever),who(ever),whom(ever), whose 在从句中充当主语，宾语，定语
连接副词 how,when,where,why 在从句中充当状语
其它连词 because,as if,as though 在从句中不充当成分，意为“因为，好像，似乎”
Group competition
Competition
1
2
3
4
5
6
Describe and Guess
What is it
1.The problem is __________ could find out a cure for the disease.
What I have not decided is ________ I am going to visit.
who whether
2.
1）填适当的引导词
看起来天要下雨了。
It looked just _____ _____ it was going to rain.
2）判断下列句子是否正确
1.The problem is whom can we get to replace her.
2.My suggestion is that we should start early tomorrow.
as if
we can
3. 根据汉语意思补全下面句子。
1） 这就是她昨天请假的原因。
This is .
2）这可能是因为他太年轻了。
It may be .
why she had a day off yesterday
because he is too young
4.
1）Both my parents have given me some advice on how to save money. But the question is ______ advice I should take.
2）Understanding science and pushing the boundaries of science is ______ makes me immensely satisfied.
whose
what
5.
完成句子
1.这就是去年举行运动会的地方。
This is 　　　　　　　　　　　　　　　　　　　last year.
2.唯一的问题是这个过程会有多快。
The only question is 　　　　　　　　　　　　　　　　　　　　　.
where the sports meeting was held
how fast the process will be
6.
翻译下列句子
1.麻烦是我把他的地址丢了
________________________________________
2.问题是他们是否能帮我们。
________________________________________.
The trouble is that I have lost his address.
The question is whether they will be able to help us.
writing
表语从句
在写作中的应用
The Predicative Clause
Used in Writing
1. Complete Exercise 2 in Assessing Your Progress on P10.
Science is simply _________ you can do. And doing science makes you a scientist! So,what do scientists do Actually, what matters is not only _________ they observe in the world around them and what questions they ask, but also _________ they use evidence or data to answer the questions. They identify useful data and take new measurements. Some of the key issues that scientists face are _________ calculations they do and _________ they analyse their data to draw conclusions about the questions they ask. The final issue, which many believe to be the most important, is _________ they need to communicate their results. This is _________ they want everyone to benefit from their work! It seems _________ science is all around us. You see, by doing science, scientists get a better understanding of the world around them and share that understanding with the whole world .
what
what
how
what
how
that/as if
why
because
Thank you
Thank you!
Practice makes perfect!
May you succeed in your studies!

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