人教版（2019）选修二Unit 1 Science and Scientists Discover Useful Structures 表语从句课件(共20张PPT)

(共20张PPT)
subject
clauses
Unit 1 Science and Scientists
Discover Useful Structures
句子
类型
简单句
并列句
复合句
主句
形容词性从句 (定语从句)
名词性从句
副词性从句(状语从句)
主语从句
宾语从句
表语从句
同位语从句
从句
Rreview
类别 例词 说明
从属连词 that，whether（是否） 两者在从句中均不作成分，只起连接作用
连接代词 who(ever) what(ever) which(ever) 在从句中作主语、宾语、表语、定语等成分。
连接副词 when where how why 在从句中作时间、地点、方式、原因状语等成分。
主语从句的引导词
It＋be＋形容词/名词短语/过去分词/不及物动词＋ that从句
It is certain that the medicine will not bring about side effect , because thousand of patients have taken it.
形容词(necessary/likely/important/certain等
名词(短语)(a pity/a shame/no wonder等)
It is a pity that you missed such a good chance.
It’s said that he has gone to Shanghai.
过去分词(said/told/reported等)
It doesn’t matter that he is not fluent in English.
不及物动词(matter)
Whether the patient will be taken ______ unknown.
When and where the patient will be taken _____ unknown.
When the task can be finished and whether he can have a rest ________ unknown.
单数
is
is
规律1：主句的谓语动词，大多数使用______;主语为and连接的两个主从时，谓语动词用______
复数
are
1. Where we will have a picnic should be discussed.
Where will we have a picnic should be discussed.
2. How we go for a picnic should be discussed.
How do we go for a picnic should be discussed.
Rule 3
陈述句
√
√
×
×
规律2：主语从句用_______ 语序
定义：在句中充当表语的从句叫做表语从句，对主语进行解释、说明
The problem is difficult.
The issue is of great importance.
The situation is that he can not speak English.
常见的系动词有：
状态系动词：be
2.持续系动词：keep, remain, stay, lie, stand
3.表象系动词：seem, appear
4.感官系动词：look, smell, sound, taste, feel
5.变化系动词：become, grow, turn, get
6.终止系动词：prove, turn out
找出句子中的表语从句
1. One theory was that bad air caused the disease.
2. You may not believe it, but that was what happened at the initial stage of our group’s research on developing a vaccine for malaria.
3. What Snow was determined to find out was why the 1854 outbreak of cholera in London could have caused over 500 deaths within ten days.
4. We realised that what we cared about was not what aspect we needed to develop a theory in, but rather how we can reduce the cost of a vaccine without reducing its effect!
The reason for his absence is that he hasn’t been informed.
The point is whether we should lend him the money.
What people really doubt is whether the doctor will defeat the serious illness.
总结1：that _______成分，____意义，______省略。
whether _____成分，____意义，译为_____。
不做
是否
无
不能
不做
有
It looked as if it was going to snow.
It seems as though he didn’t know the answer.
That’s because we never thought of it.
--Why does this applied science, which saves work and makes life easier, brings us little happiness
--That is because we have not yet learn to make sensible
use of it.
总结2：as if / as though _______成分，意为“___________”
常置于look, seem, sound,be,become 等后；
because做___________意为“______”
似乎，好像
因为
不做
原因状语
注意：as if/as though引导的表语从句如果是事实，就用陈述语气；如果与事实不符，就用虚拟语气。
1. It sounds as if someone is knocking at the door. (与事实相符)
2. Tom likes to talk big as if he were an important person.
(对现在的虚拟，用一般过去时，be动词用were)
3. He opens his mouth as he would say something.
(对将来的虚拟，用would/could/might+do)
4. He talked about Rome as if he had been there.
(对过去的虚拟，用had done)
The problem was who could do the work.
That’s what he is worrying about.
The question is which student/which of us should go.
What I have not decided is whom I am going to visit.
Both my parents have given me some advice on how to save money. But the question is whose advice I should take.
总结3：who在从句中充当 __________, 译为 ______。
what在从句中充当 ___________, 译为 ______。
which在从句中充当 ____________, 译为 ______。
whom在从句中充当 ___________, 译为 ______。
whose在从句中充当 ___________, 译为 ______。
主语/宾语
谁
主语/宾语
东西
主语/定语
哪一
宾语
定语
谁的
谁
1.Whoever leaves the room last ought to turn off the lights.
2.Whatever he did was right.
3.Whichever of you comes in will receive a prize.
whoever在主语从句中充当 __________, 译为 ______。
whatever 在主语从句中充当 __________, 译为 ______。
whichever在主语从句中充当 ___________, 译为 ______。
主语/宾语
无论谁
主语/宾语
无论什么
主语/定语
无论哪个
The next major explosion is going to be when genetics and computers come together.
Go and get your coat. It’s where you left it.
I had neither a raincoat nor an umbrella. That’s why I got wet through.
That is how mice ruin large scores of grain every year.
总结4：when在主语从句中充当 _______, 译为 ______。
where在主语从句中充当 _______,译为 ______。
why在主语从句中充当 _______, 译为 _______。
how在主语从句中充当 _______,译为 _______。
状语
何时
状语
何地
状语
为什么
状语
怎样
类别 例词 说明
从属连词 that，whether（是否） as if/as though (好像) 两者在从句中均不作成分，只起连接作用
连接代词 who(ever) what(ever) which(ever) 在从句中作主语、宾语、表语、定语等成分。
连接副词 when where how why 在从句中作时间、地点、方式、原因状语等成分。
Summary表语从句的引导词
The reason is ________ he missed the bus.
Why we decided to put off the football match is ________ the weather was too bad.
the reason
主语从句
that
that
规律1：当主句的主语是 ________ 或 why 引导的 __________时常用 ______ 来引导表语从句，而不用 because。
that
规律2：why +_____ 表示“_________________________”
because + _______ 表示“___________________”
这 / 那就是……的原因
结果
这 / 那就是因为……
原因
Linda cheated in the exam, and I think that’s _____ he was so angry.
I think it is ________ Linda cheated in the exam, so he was so angry.
The reason ______ he was so late is _____ it was raining hard.
because
why
that
why