高中英语主语从句讲解课件（36张ppt）

(共36张PPT)
Grammar
Grammar
名词性从句包括：
宾语从句：介宾结构；动宾结构
表语从句：系表结构(系动词后面跟一个从句)
主语从句: 一个句子做主语
同位语从句：对名词进行解释说明
判断下列从句：
1.China is no longer what she used to be.
2.The question remains whether they will be able to help us.
3.It seemed as if I couldn't think of the right word. 4.The reason why I study hard is that I want to go to a key university.
5.They believe in that she must still be single.
6.I know nothing about him except that he is living in Beijing
7. I don’t know whether he’s free or not.
8. Mary asked whether I was doing my homework or not.
9. I’m thinking of whether we should go fishing.
10. We are worried about whether it will rain tomorrow.
表语从句
宾语从句
(1). 连接词：that 在句子中不充当任何成分，无意义，不可省略
That he will win is certain.
That he got the first prize made his parents very happy.
That China has become strong is certain.
That they love each other is obvious.
That he played computer games into night made his parents disappointed.
(2). 连接词 whether 在句中不充当成分，意为“是否”
Whether we go by train or by boat makes no difference.
Whether life exists on other planets is not clear.
Whether he’ll come here isn’t clear.
Whether the old bus station should be replaced with a modern hotel or not is under discussion.
(3). 连接副词 when(时间), where(哪里), why(为什么), how(怎么；如何)有词义，在从句中担任状语。
Why Chen Lin committed suicide has not been clear yet.
How this happened is not clear to anyone.
Where he found the treasure remains a mystery.
When we will hold the graduation ceremony has not been decided yet.
When they will leave is not decided.
(4). 连接代词：who(谁，主格); whom(谁；宾格); whose(谁的); what(什么…事/话…); which(哪一个); whoever(无论谁), whatever(无论什么), whichever(无论哪一个) 在句子中担任主语，宾语，表语或定语
Who will host the meeting hasn’t been decided yet.
Which plan is better should be discussed.
Whoever comes to China is welcome.
Whatever you do in your spare time should do no harm to others.
Whoever breaks the law will be punished.
主语从句能用it做形式上的主语(二)
注意: 由that 引导的主语从句有时为了使句子结构平衡, 避免 “头重脚轻”, 常用 it 作形式主语, 而把从句放在后面。 例如:

1. That he will refuse this piece of advice is impossible.
_______________________________________ _______________________________________
2.That they should like each other is natural.
_____________________________________
*it为形式主语
It is natural that they should like each other.
It is impossible that he will refuse this piece of advice.
这样就构成了下面一些常用句型:
1) It is + n. +从句
　 It is a pity/shame that... 遗憾的是……
　 It is a surprise that…令人惊奇的是…
　 It is a fact that… …是事实
It is common knowledge that… …是常识
*_______________(很遗憾)we lost the match.
*______________(这是事实)he cheated in the exam.
It is a pity that
It is a fact that
2) It is + adj. +从句
　 It’s certain that… 肯定…
　 It is possible that... 很可能……
　 It is unlikely that... 不可能……
It is obvious that… 很明显…
It is necessary \important \natural\... that…
*_________________(很可能)she will come back tomorrow.
*_________________(很明显)this measure is effective.
+(should) +do…
It is possible that
It is obvious that
3) It + be +过去分词+从句
It is said that... 据说……
It is known to all that... 众所周知……
It is reported that... 据报道……
It is believed that...据信……;人们相信……
It is suggested that + (should）do... 建议……
It must be admitted that…必须承认……
It cannot be denied that… 不可否认…… 　　
It must be pointed out that…需指出的是…… 　
*___________________(据报道)20 people were killed in the accident.
*______________________(建议)we should eat more vegetable and do more exercise.
It is reported that
It is suggested that
4) It +不及物动词+从句
It happened that... 碰巧……
It occurred to me that…我突然想起…
________________(刚好)I came into the office at that time.
____________________(我突然想起)I forget to sent the letter.
5) It + 及物动词+宾语+that从句
It worried her a bit that her hair was turning grey.
It shocked me that he didn’t tell anybody where he was.
It happened that
It occurred to me that
主语从句中应注意的问题
(一). 语序应是陈述句语序
How he managed to survive in the forest interested everyone present.
When he will come is not known.
What he needs is an English dictionary.
(二). 谓语动词的单复数
When we shall hve our sports meeting ____(have) not been decided yet. What I need ____(be) money. What I need _____(be) books. When they will start and where they will go _____(have) not been decided yet. When and where the meeting will be held _____(have) not been decided.
has
is
are
have
has
(三) if/wheter 在主语从句中的用法
If the meeting will be put off has not been decided yet.
Whether the meeting will be put off has not been decided yet.
注意：whether 可以引导主语从句可以放在句首，
但if不能
(四). 判断以下句子是否正确：
They should like each other is natural.
That they like each other is natural.
It is natural that they like each other.
错误
正确
正确
That引导的主语从句放句首，既不充当成分又无意义，但that不能省去。
找出错误，并给出理由：
1.Where shall we spend the holiday isn’t decided.
2.You have made a mistake is a fact.

3. If the policeman will come is not certain.
4. That is certain that we can win.

we shall
Whether
It
That you have
5. It is ordered we should leave at once.
6. Where he comes from are a mystery.
7. What whether he likes the job is not clear.
8. Who he is and where he is from is important.
9.What he saw is the stars in the sky.
that
is
x
are
are
Exercises :
Part One: 主语从句单选题
1. has helped to save the drowning girl is worth praising.
A.Who B.The one C.Anyone D.Whoever
D
2.It was he said disappointed me.
A.what ;that B.that; that C.what;what D.that;what
A
3. we’ll go camping tomorrow depends on the weather.
A.If B.Whether C.That D.Where
B
4. he said at the meeting surprised everybody present.
A.What B. That C.The fact D.The matter
A
5. was to return to school.
A.That really interested him B.What really interested him
C.Which really interested him D.That interest him really
B
6. makes mistakes must correct them.
A.What B.That C.Whoever D.Whatever
C
7. your men have been on my land without permission.
A.It seems that B.There seems to be
C.That seems D.It seems for
A
8.It has always puzzled me the old man lied a red
silk ribbon on the young tree.
A.that B.why C.where D.what
B
___ he made an important speech at
the meeting was true.
A. That B. Why C. What D. How
2. ___we’ll go camping tomorrow depends on the weather .
A If B Whether
C That D Where
3. It worried her a bit ___ her hair was turning gray.
whether B. that
C. what D. when
4.What I say and think ___ none of your business.
A. is B. are C. has D have
1. _____ you don’t like him is none of my business.
2. _____ he said at the meeting astonished everybody present
3. ________ the 2000 Olympic Games will be held in Beijing is not known yet.
4. ________ we’ll go camping tomorrow depends on the weather.
5. ________ leaves the room last ought to turn off the lights.
That
What
Whether
Whether
Whoever
请用恰当的主语从句连词填空: What ,it ,that , whether, whoever
Correct or not?
*When the meeting will be held haven’t been known yet.
……………………………. be held hasn’t been known yet.
×
Pay attention:主语从句的谓语用单数形式

10


the cat do
made
What the cat did made the baby cry.
What
cry
Make a sentence
30
1.The question is ________ the film is interesting.
2.________ we shall attend the meeting hasn't been decided yet.
用whether\if填空
whether
Whether
10
talk about
the use of
cell phone
What they are talking about is the
use of cell phone.
Make a sentence
30
* If we will have a meeting hasn’t been decided yet.
×
Correct or not?
Whether we will………………………….
decided yet.
Pay attention:放在名词性从句句首，表示“是否”，只能用whether, 不能用if
10
　　
report , get the highest points, match
It is reported that Yao Ming got the highest points in the match.
Make a sentence
30

×
Correct or not?
Pay attention:此主语从句缺少成分-宾语，故用作成分的what来引导，而不用that。
What she wants to know is…….
*That she wants to know is when the party will be held .
10

×
Correct or not?
Pay attention:由that引导的主语从句放在句首，that 不能省略。
That he will give up………
*He will give up his job surprises all of us.
10
Translate the sentence
*_______________________________（她是否出席会议）is not certain.
Whether she will attend the meeting
20
It makes the teacher angry that the child doesn’t know the answer.
teacher angry
Don’t know the answer
Make a sentence
30
___ he made an important speech at the meeting was true.
A. That B. Why C. What D. How
2. ___we’ll go camping tomorrow depends on the weather .
A If B Whether C That D Where
3.___ is known to us all that America is a developed country .
A Which B As C What D It
4. It’s known to us all ___ a form of energy .
A. water is B. that water is C. is water D. that water to
5. It worried her a bit ___ her hair was turning gray.
A. whether B. that C. what D. when
6.What I say and think ___ none of your business.
A. is B. are C. has D have