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主语从句


名词性从句的作用相当于名词, 名词性从句的作用相当于名词,因此主语从 的作用相当于名词 句、表语从句 、宾语从句和同位语从句分别作 主句的主语、表语、宾语和同位语。 主句的主语、表语、宾语和同位语。

Who will win the match is still unknown.
主语从句

I want to know wh

at he has told you.
宾语从句

The fact is that we have lost the game.
表语从句

The news that we won the game is exciting.
同位语从句

Subject Clause (主语从句 主语从句) 主语从句

Noun Clauses (名词性从句 名词性从句) 名词性从句

Object Clause 宾语从句) (宾语从句) Predicative Clause 表语从句) (表语从句) Appositive Clause 同位语从句) (同位语从句)

Is the moon a planet ? This question is ______________if students are to show that they fundamental understand the nature of astronomy Some __________. scientists think that the earth ______________ the gave birth to moon because the moon circles our planet. Others existed believe that the moon _______ before the earth was formed. They think that earlier in time it travelled through space as a small planet which was caught As a result by the earth’s gravity. __________, it goes around our atoms planet. The evidence for this theory is that the _____ that make up the rocks on the moon seem to be different from those on earth. What is clear is that the prevents moon is smaller than the earth and this _________ it from _______ escaping from the earth. Although its origin puzzle may still be a ________, the moon can never be anything more than a satellite of the earth.

Is the moon a planet ? This question is fundamental ______________if students are to show that they astronomy understand the nature of __________. Some scientists gave birth to think that the earth ______________ the moon because the moon circles our planet. Others believe that the moon existed _______ before the earth was formed. They think that earlier in time it travelled through space as a small planet As a result which was caught by the earth’s gravity. __________, it goes around our planet. The evidence for this theory is atoms that the _____ that make up the rocks on the moon seem to be different from those on earth. What is clear is that the moon is smaller than the earth and this prevents from _________ it _______ escaping from the earth. Although puzzle its origin may still be a ________, the moon can never be anything more than a satellite of the earth.

主语从句: 主语从句:
做主语用的名词性从句,因其在复合句中做主语, 做主语用的名词性从句,因其在复合句中做主语, 又称主语从句,引导主语从句的有连词that , 又称主语从句, whether, 连接代词who ,what ,which, 连 接副词when,where, how, why等。

1)从属连词:that, whether等. )从属连词: , 等 that 引导主语从句只起引导作用,本身无实 引导主语从句只起引导作用, 际意义,在主语从句中不充当任何成分, 际意义,在主语从句中不充当任何成分,但 不能省略。 不能省略。 That people cut down too many trees destroyed the balance of nature. Whether life will continue on the earth for millions of years to come will depend on whether this problem can be solved.

If × Whether the solid shape would last or not was not clear. . if It was not clear whether the solid shape would last or not.
Real Subject Formed Subject Subject Clause

引导主语从句在句首只能用whether, Conclusion:

作形式主语的whether/if都可以 都可以. 有it作形式主语的 作形式主语的 都可以

注意: 注意 由that 引导的主语从句有时为了使句
子结构平衡, 头重脚轻” 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: 主语 而把从句放在后面。 例如 1. That he will refuse this piece of advice is impossible. It is impossible that he will refuse this piece _______________________________________ of advice. _______________________________________

*it为形式主语 为形式主语
2.That they should like each other is natural. It is natural that they should like each other. _____________________________________

这样就构成了下面一些常用句型: 这样就构成了下面一些常用句型 1) It is + n. +从句 从句 It is a pity/shame that... 遗憾的是 遗憾的是…… It is a surprise that…令人惊奇的是 令人惊奇的是… 令人惊奇的是 It is a fact that… …是事实 是事实 It is common knowledge that… …是常识 是常识 It is a pity that 很遗憾)we lost the match. *_______________(很遗憾 很遗憾 It is a fact that 这是事实)he cheated in the *______________(这是事实 这是事实 exam.

2) It is + adj. +从句 从句 It’s certain that… 肯定 肯定… It is possible that... 很可能 很可能…… It is unlikely that... 不可能 不可能…… It is obvious that… 很明显 很明显… It is necessary \important \natural\... that… +(should) +do… It is possible that 很可能)she will come *_________________(很可能 很可能 back tomorrow. It is obvious that 很明显)this measure is *_________________(很明显 很明显 effective.

3) It +不及物动词 从句 不及物动词+从句 不及物动词 It happened that... 碰巧…… 碰巧 It occurred to me that…我突然想起 我突然想起… 我突然想起
It happened that 刚好)I *________________(刚好 came into the office 刚好 at that time. *____________________(我突然想起 forget to 我突然想起 It occurred to me that 我突然想起)I sent the letter.

4) It + be +过去分词+从句
It is said that... 据说…… 据说 It is known to all that... 众所周知 众所周知…… It is reported that... 据报道 据报道…… It is believed that...据信 据信……;人们相信 人们相信…… 据信 人们相信 It is suggested that + (should)do... 建议 建议…… ) It must be admitted that…必须承认 必须承认…… 必须承认 It cannot be denied that… 不可否认…… 不可否认 It must be pointed out that…需指出的是 需指出的是…… 需指出的是

It is reported that 据报道)20 people were *___________________(据报道 据报道 killed in the accident. It is suggested that 建议 *______________________(建议 建议)we should eat more vegetable and do more exercise.

T or F questions
:They should like each other is natural. :That they should like each other is natural. :It is natural that they should like each other. :If Mary really heard him is really doubtful. :It was doubtful if Mary really heard him.

2.连接代词 连接代词who ,what ,which, 连接代词 whatever, whichever, whoever What many scientists believe is that the continued presence of water … Who will take part in the meeting has not been decided. Whoever breaks the law will be punished. Which student will win the first is uncertain.

3)连接副词 连接副词when,where, how, why等。 连接副词 , , , 等
Why they suddenly disappeared still remains a mystery. When they will set off is not decided. Where she is from is unknown. How we will paint the house has not been decided.

Complete the sentences using what, whether, where, when, who, why, how or that.
What 1.(_____ is needed for success) is your hard work. When/How 2.(______ they will arrive )has been told to the teacher. Where/whether 3.(_____ we will go tomorrow )hasn’t been decided yet. 4.(______ can join in the sport meet) is decided by the teacher. Who 5.(________ it will rain or not) is not clear. Whether Why 6. (____ the earth is becoming warm) is a good topic for research. 7.(______ the earth is a solid ball) is known to us all. That
Conclusion: 主语从句作主语时,谓语动词一般用单数形式。 主语从句作主语时,谓语动词一般用单数形式。

Summary:
Subject Clause
1. 用 that / whether / if/ /where / how / when /why / who /what/which/ how much / etc. 来连接主语从句 来连接主语从句.
2.That 在主语从句中不能省略 在主语从句中不能省略.

3.引导主语从句在句首只能用 引导主语从句在句首只能用whether, 引导主语从句在句首只能用 作形式主语的whether/if都可以 都可以. 有it作形式主语的 作形式主语的 都可以 4.有时为了使句子结构平衡 避免 “头重脚轻”,常用 有时为了使句子结构平衡, 头重脚轻” 常用 有时为了使句子结构平衡 it 作形式主语 而把从句放在后面 种句型。 作形式主语,而把从句放在后面 种句型。 而把从句放在后面.4种句型 5.主语从句作主语时,谓语动词一般用单数形式。 主语从句作主语时, 主语从句作主语时 谓语动词一般用单数形式。

1. _____ we need more practice is quite obvious. A. What B. That C. When D. /
2. _______ they can solve the question is still unknown. A. If B. Which C. Whether D. What 3. _____ he said at the meeting astonished everybody. A. Why B. What C. That D. Who 4. ____ is a fact that English is accepted as an international language. A. There B. This C. That D. It

Pick up one number and finish the task in it, then you can get some points.

1

2

3

4

5

6

7

8

9

10

11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

Correct or not?

10

*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 主语从句的谓语用单数 主语从句的谓语用单数形式

×

Make a sentence What

30 the cat do made

cry What the cat did made the baby cry.

用whether\if填空 填空

10

whether 1.The question is ________ the film is worth seeing. Whether 2.________ we shall attend the meeting hasn't been decided yet.

Translate the sentence

20

That they are badly in need of help 他 *_______________________________(他 们很需要帮助)is 们很需要帮助 quite clear.

Make a sentence

30 talk about the use of cell phone

What they are talking about is the use of cell phone.

Correct or not? * If we will have a meeting hasn’t been
decided yet.

10

×

Whether we will…………………………. decided yet. Pay attention:放在名词性从句句首,表示 放在名词性从句句首 放在名词性从句句首, 是否” 只能用whether, 不能用 不能用if “是否”,只能用

Translate the sentence

20

*It is known to us__________________ how Mark Twain became a great writer 马克 _____________________(马克 吐温怎样成 马克.吐温怎样成 为一位伟大的作家). 为一位伟大的作家

Make a sentence

30

report , get the highest points, match It is reported that Yao Ming got the highest points in the match.

Correct or not? *It is important that we will finish the work on time.

10

×

It is important that we should finish….. Pay attention:注意虚拟语气在名词性从句中的 注意虚拟语气 虚拟语气在名词性从句中的
使用! 使用!在It is necessary \important \natural\... that…句型中,从句的谓语要用should+do 的形式 句型中,从句的谓语要用 句型中

Correct or not? *That she wants to know is when the party will be held . What she wants to know is…….

10

×

Pay attention:此主语从句缺少成分 宾语, 此主语从句缺少成分 宾语, 此主语从句缺少成分-宾语 故用作成分的what来引导,而不用 来引导, 故用作成分的 来引导 而不用that。 。

Correct or not?

10

*He will give up his job surprises all of us. That he will give up………

×

Pay attention:由that引导的主语从句放在句 由 引导的主语从句放在句 不能省略。 首,that 不能省略。

Translate the sentence

20

Whether she will attend the meeting *_______________________________ 她是否出席会议) (她是否出席会议)is not certain.

Make a sentence

30

Don’t know the answer

teacher angry

It makes the teacher angry that the child doesn’t know the answer.


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