2023届高三英语复习：主语从句 课件 （30张）

(共30张PPT)
主语从句
The subject clause
1. My mother is a beautiful woman.
S
2. She loves her husband very much.
S
3. The suggestion sounds unreasonable.
S
Subject？
Please pick out the subject of each sentence
1. What Yuan Longping really cared about was not money or celebrity.
2. That Yuan Longping had realised his dream of seawater rice surprised the whole world.
More examples
V
S
S
V
It surprised the whole world that Yuan Longping had realised his dream of developing seawater rice.
it-形式主语，真正的主语是that引导的主语从句
S
O
V
在句中充当主语的从句叫做主语从句，从句通常放在主句的谓语动词之前。引导主语从句的引导词一般都不能省略。用it作形式主语时，主语从句往往后置。
Subject clause？
Discovering the subject.
What it was to become was uncertain.
2. It was not clear whether the shape would last or not.
3. What is even more important is that as the earth cooled down, water began to appear on its surface.
4. It was not immediately obvious that water was to be crucial to the development of life.
5. What many scientists believe is that the presence of water allowed the earth to exist.
7. Whether life will continue on the earth for millions of years to come will depend on whether this problem can be solved.
6. Why they suddenly disappeared still remains a mystery.
引导词
连词
连接代词
连接副词
that
whether
who whom
whose what whoever…
when how
where why
…
意义
功能
是否
谁 谁
谁的 什么
无论谁
何时 怎样
何地 为什么
不充当任何成分,只起连接作用，不可省略
主语 宾语
表语 定语
状语
无意义
主语从句
引导词
汇总
Filling the blanks 填一填
the chorus contest will be held makes everyone excited.
That


class will win the contest remains to be seen.
Which
and the contest will be held has not been decided yet.
When
where

Class wins the first prize.
you can succeed depends on whether you work hard.
Oh, my god!
Mid-term exam is approaching.
What should I do
Whether
you have done today will make a big difference to your scores.
What
comes late will be punished by the teacher.
Whoever
keep in mind 记一记
1. that / what
______ interests me most is how he got his money back.
______ many scientists believe is that the universe began with a “Big Bang”.
_______ he didn’t turn up at the meeting disappointed me a lot.
_______ he wore his coat inside out made his classmates burst into laughter.
What
What
That
That
what 引导主语从句时在从句中充当句子成分，如主语、宾语、表语，而that 则没有任何实义，也不充当成分，只起连接作用，但不可省略
2.从句的语序要使用陈述句的语序
When will we set up the factory hasn’t been decided.
When we will set up the factory hasn’t been decided.
How did he solve the problem is a mystery.
How he solved the problem is a mystery.
3. 主谓一致的问题
Why he didn’t come ____ a mystery.
is
What we need _____ books. What we need ___ love.
are
is
从句做主语时，谓语动词一般用单数。但是what 和who 引导主语从句时，谓语动词的数应当与主句中作表语的名词的数保持一致.
When and where the meeting will be held ______ not been decided.
When they will start and where they will go _____ not been decided.
has
have
如果由and 连接两个或两个以上的主语从句作主语，谓语动词用作复数。由两个或多个连接词引导一个主语从句时，谓语动词用单数。
It's uncertain whether/if he'll come this evening.
It was doubtful whether/if Tom really saw Sharon.
whether与if 引导主语从句，位于句中有时可换用。
4. whether/if
用whether不用if的情况：
1.① Whether we'll go camping tomorrow depends
on the weather.
② It makes no difference whether you will go
today or tomorrow.
2.① Whether or not he will come still remains a
question.
② Whether we'll succeed remains to be seen.
1.主语从句位于句首时；
2.从句后有or或紧跟or not时
5. it 做形式主语的情况
Why？
避免头重脚轻
It surprised the whole world that Yuan Longping had realised
his dream of developing seawater rice.
That he failed the exam was apparent.
It was apparent that he failed the exam.
Now, let have a brain storm.
Write down the sentences pattern including ''It'' as the subject.
certain
clear
important
necessary
probable
possible
it作形式主语
常用句型有：
It is/was
+that – clause
1. It+be+形容词+that从句
2. It + be + 名词词组 + that从句
pity
shame
duty
① It is a pity that he missed such a good
chance.
It is / was a
+ that – clause
② It is a shame that you're sick.
很遗憾他错过了这么好的机会。
真遗憾你病了。
3. It + be + V-ed + that从句
said
reported
thought
hoped
believed
known
It is
+ that – clause
① It is said that he is the best student in
the class.
② It is thought that Joe drives badly.
据说他是班上最好的学生。
人们认为乔开车开得不好。
① It seems that Alice is not coming to the
party at all.
② It happened that I was out that day.
③ It appears to me that you don’t want to
come to the party.
4. It + seem, happen, appear等不及物动词
+ that从句。
爱丽丝似乎不来参加晚会。
碰巧我那天外出了。
在我看来，你不想来参加聚会。
总结：用it作形式主语常用句型有:
1.It be +形容词 ＋that主语从句
2. It be ＋名词(词组)＋that主语从句
3. It be ＋过去分词＋that主语从句
4.It seems/happans/appears等不及物动词及短语 +that 主语从句
5.It doesn’t matter/makes no difference (没有影响/毫无区别)etc.+连接代词(副词)引导的主语从句
Testing 测一测-Correct the sentences
1.1. Why did she refused to apologize to his friend was not known.
2. When and where the meeting will be held still remain a question.
3. What he needs are more time and what I need is enough books.
remains
is
are
4.That is the most important in learning English is enough
exercise.
5. If we will go camping tomorrow depends on the weather.
6.As is known to all that paper was first invented in China.
What
Whether
It
Composition 写一写 - Describe an event(检讨)
（至少用两处主语从句）内容提示：意识到老师说的有道理，上课看小说确实不对。反思自己，绝对不犯。
I am Li Hua. The other day, during the class, I was reading a novel when the teacher came to me. She criticized me. I was sad at first. But later on, I was aware that 。
。
I am Li Hua. The other day, during the class, I was playing my cell phone when the teacher came to me. She criticized me. I was sad at first. But later on, I was aware that what the teacher ( had) said was right. It was not proper that I read a novel in class.
In my opinion, what I have done today will determine who I will become in the future,so I promise I will not do it again.
Thank you all！