人教必修三 Unit4 主语从句详细讲解课件56PPT
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高中英语必修三第四单元语法主语从句 PPT
• 2、I_t _is_p_re_d_ic_t_ed_______(据推测) that she will e back tomorrow、
• 3、It i_s_n_e_c_e_s_sa_r_y___(有必要)that we should learn English、
It’s necessary/ important/ natural /strange that +从句(虚拟语气 should +动 词原形)
规律三、whether 可以引导主语从句, 放在句首,但if不能
Usage of the Conjunctions
功能
连接词
不作成分 that, whether
作主、宾、表、 what, who, whom,wh+ever
作定语
which, whose,
作状语
when, where, why, how
It is obvious that…… 显然、、、
It is important that …、 重要得就是…
It +不及物动词+that
It happened that、、、
碰巧……
It occurred to me that…我突然想起…
• 1、It_i_s_a_s_u_rp_r_is_e_____(就是个惊喜)that he changed his mind、
题。 _It__is_b_e_l_ie_v_e_dthat the word diaosi reflects social problems、
任何见到这个
女孩得人都被 她吸引。 Whoever s_e_e_s _t_he__g_ir_l __ is attracted by her、
• 3、It i_s_n_e_c_e_s_sa_r_y___(有必要)that we should learn English、
It’s necessary/ important/ natural /strange that +从句(虚拟语气 should +动 词原形)
规律三、whether 可以引导主语从句, 放在句首,但if不能
Usage of the Conjunctions
功能
连接词
不作成分 that, whether
作主、宾、表、 what, who, whom,wh+ever
作定语
which, whose,
作状语
when, where, why, how
It is obvious that…… 显然、、、
It is important that …、 重要得就是…
It +不及物动词+that
It happened that、、、
碰巧……
It occurred to me that…我突然想起…
• 1、It_i_s_a_s_u_rp_r_is_e_____(就是个惊喜)that he changed his mind、
题。 _It__is_b_e_l_ie_v_e_dthat the word diaosi reflects social problems、
任何见到这个
女孩得人都被 她吸引。 Whoever s_e_e_s _t_he__g_ir_l __ is attracted by her、
人教高中英语必修3Unit4 Grammar The subject clause主语从句(共29张PPT)
1）主语从句在句首只能用whether, 有it作形式主 Conclusion: 语时whether/if都可以。
2）whether/if 在从句中不充当句子成分，
但有意义“是否”，不能省略。
3.连接代词和连接副词的用法：
1）连接代词：what (whatever ) ，who( whoever) ， which (whichever)，whom，whose .可以在从句中作主语，宾语表语。
* If we will have a meeting hasn’t been
decided yet. ×
Pay attention:放在主语从句句首，表示“是 否”时，只能用whether, 不能用if
Correct or not?
10
What
*That party
she will
wants to be held .
It is certain that price will go up .
3. That they are badly in need of help is quite clear.
It is quite clear that they are badly in need of help.
Pick up one number and finish the task in it, then you can get some scores.
3.How did dinosaurs die out is still a mystery.
dinosaurs died out Conclusion: 从句必须用陈述语序。
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:
人教高中英语必修3Unit4主语从句课件(共24张PPT)
All in all, how we can improve our English grades depend on whether hard we work.
宾从、表从复习 • 1) I think t_h_a__t you are helpful and _t_h_a_t_ you
are a good friend.
• 2) Humans are curious about _h_o__w__ life began
on the earth.
• 3）My suggestion is _th__a_t_ we should read the
English texts every day.
• 4) Fighting for our dreams is _w__h_e_r_e_ the
What is more important is we should have a positive attitude to studying English. Everyone can make mistakes is possible. Thus, enjoy lose face and you’ll have more chances to improve your English quickly.
• 3)._W__h_e_t_h_e_r_ we will get good grades depends on whether we work hard表. “是否”只用whether
• 4) __W__h_y___ he didn’t come yesterday is unknown.
Exercise:
• 5). __W_h_o____ will take the place of Mr. White as the new CEO is being discussed .
宾从、表从复习 • 1) I think t_h_a__t you are helpful and _t_h_a_t_ you
are a good friend.
• 2) Humans are curious about _h_o__w__ life began
on the earth.
• 3）My suggestion is _th__a_t_ we should read the
English texts every day.
• 4) Fighting for our dreams is _w__h_e_r_e_ the
What is more important is we should have a positive attitude to studying English. Everyone can make mistakes is possible. Thus, enjoy lose face and you’ll have more chances to improve your English quickly.
• 3)._W__h_e_t_h_e_r_ we will get good grades depends on whether we work hard表. “是否”只用whether
• 4) __W__h_y___ he didn’t come yesterday is unknown.
Exercise:
• 5). __W_h_o____ will take the place of Mr. White as the new CEO is being discussed .
人教高中英语必修3Unit4Subject-clause主语从句 (共25张PPT)
Faced with the failure in our life, what should we do?
What we should do is to……
What doesn’t kill you makes you stronger, stand a little taller.
What doesn’t kill you makes you a fighter.
called 《American Idol 》.
Summary1:
• 定义：主语从句是在复合句 中充当_____的从句。
• 主语从句要________ 语序。
Task2: (1)Complete the sentences:
• 1.W__h_at_ is important in our life is to have a great aim. 生活中重要的事情是有一个伟大的目标。
that
a
sparrowcana Nhomakorabeasofly
in
That they learn English so well is no wonder.
It is no wonder that they learn English so well.
On April 1st,2017 ,that China will establish (建立）
Summary 4:
一般来说，主语从句都是位于 _句_首___,但有时为了使句子 _________,避免“头重脚轻”,常 用___ 作形_式_主__语___,从而把主语从 句放到后面。
常用句型：
It is +adj. +that…… It is + n. + that…… It is + 过去分词 + that …… It happens/appears/seems/occurred to sb. that……
What we should do is to……
What doesn’t kill you makes you stronger, stand a little taller.
What doesn’t kill you makes you a fighter.
called 《American Idol 》.
Summary1:
• 定义：主语从句是在复合句 中充当_____的从句。
• 主语从句要________ 语序。
Task2: (1)Complete the sentences:
• 1.W__h_at_ is important in our life is to have a great aim. 生活中重要的事情是有一个伟大的目标。
that
a
sparrowcana Nhomakorabeasofly
in
That they learn English so well is no wonder.
It is no wonder that they learn English so well.
On April 1st,2017 ,that China will establish (建立）
Summary 4:
一般来说，主语从句都是位于 _句_首___,但有时为了使句子 _________,避免“头重脚轻”,常 用___ 作形_式_主__语___,从而把主语从 句放到后面。
常用句型：
It is +adj. +that…… It is + n. + that…… It is + 过去分词 + that …… It happens/appears/seems/occurred to sb. that……
人教版高中英语必修三 Unit 4 Astronomy Subject Clauses 主语从句课件
❖ What I like most is ..
❖ What I dislike is ..
❖ what I find difficult is...
❖ what worries me is...
❖ what I want to say is..
❖ It’s +adj.+that...
homework
❖ 6.It is not yet decided ________school he will go next year.
❖ 7. ______he was late is that he missed the bus.
❖ 8._________ we can protect the environment needs to be discussed.
❖ 10.Where she is from is unknown.
连词 连接代词 连接副词
引导词
that whether who whoever what whatever which whose when where why how
意思
是否 谁 无论谁
什么，所…的
无论什么 哪一个 谁的 什么时候 哪里 为什么 怎样，如何
•Subject
Clauses 主语从句
Let’s enjoy a song “As long as you love me” and pay attention to the
underlined sentences.
❖ Although loneliness has always been a friend of mine I'm leaving my life in your hands People say I’m crazy and I am blind 宾语从句 Risking it all in a glance How you got my blind is still a mystery.….
❖ What I dislike is ..
❖ what I find difficult is...
❖ what worries me is...
❖ what I want to say is..
❖ It’s +adj.+that...
homework
❖ 6.It is not yet decided ________school he will go next year.
❖ 7. ______he was late is that he missed the bus.
❖ 8._________ we can protect the environment needs to be discussed.
❖ 10.Where she is from is unknown.
连词 连接代词 连接副词
引导词
that whether who whoever what whatever which whose when where why how
意思
是否 谁 无论谁
什么，所…的
无论什么 哪一个 谁的 什么时候 哪里 为什么 怎样，如何
•Subject
Clauses 主语从句
Let’s enjoy a song “As long as you love me” and pay attention to the
underlined sentences.
❖ Although loneliness has always been a friend of mine I'm leaving my life in your hands People say I’m crazy and I am blind 宾语从句 Risking it all in a glance How you got my blind is still a mystery.….
人教高中英语必修3Unit4主语从句 (共24张PPT)
. Rewrite the following sentences with a subject clause. 1.Do the other astronomers accept his ideas?
2.It remains a question.
Whether t_h_e__o_th_e_r__a_st_r_o_n_o_m__e_rs__a_c_ce_p_t__h_is_ i_d_e_a_s_r_e_m__a_in_s__a_q_u_e_s_t_io_n__
Thank you !
Remember always to Tell yourself:
It’s a fact that English is not ard to learn. It’s certain that I can learn English very well
by working hard. I love English!
（3）主语从句一般位于谓语__之__前____. 为避免主语过长,可以把主语从句移到句子末尾 用___i_t ___作为句子主语,
常见的句型为 It is said/reported that据说/据报道 It occurred to sb that 某人刚刚想到….. It happened that 碰巧… It turned out that 证明是 It’s no wonder that 难怪…..
What we could do was just waiting and praying.
Why the plane once changed its air line made people puzzled?
That the plane can not come back has been a fact .
人教高中英语必修3Unit4主语从句 (共39张PPT)
结论： what 引导的从句做主语时，谓语的单复数取决它的__表__语____.
拓展
That we can’t go to see the movie is a pity. It is a pity that we can’t go to see the movie.
形式主语
形式主语常用句型
It + be + 名词 ＋ that从句
teacher. 3. _W__h__e_t_h_e_r_ he will join us or not makes no difference.
随堂自测 单句改错
1. When the meeting will be held have not been known
yet.
has
2. That he said made me very angry. What
5. What he has said is true. （从句）
结论：（1）主语是句子说明的人或事物，一般放在__句__首________. （2）在句子中充当_____主__语_____的从句就是主语从句。.
Deal with Learning Plan
找出下列句子中的主语从句
1. That he will pass the exam is certain. 2. Whether he will pass the exam is uncertain. 3. Who will go makes no difference. 4. What we need is more time. 5. Which book I shall choose hasn’t been decided.
3. That is said that Tom never eats meat. It
拓展
That we can’t go to see the movie is a pity. It is a pity that we can’t go to see the movie.
形式主语
形式主语常用句型
It + be + 名词 ＋ that从句
teacher. 3. _W__h__e_t_h_e_r_ he will join us or not makes no difference.
随堂自测 单句改错
1. When the meeting will be held have not been known
yet.
has
2. That he said made me very angry. What
5. What he has said is true. （从句）
结论：（1）主语是句子说明的人或事物，一般放在__句__首________. （2）在句子中充当_____主__语_____的从句就是主语从句。.
Deal with Learning Plan
找出下列句子中的主语从句
1. That he will pass the exam is certain. 2. Whether he will pass the exam is uncertain. 3. Who will go makes no difference. 4. What we need is more time. 5. Which book I shall choose hasn’t been decided.
3. That is said that Tom never eats meat. It
人教新课标必修三 Unit 4 Astronomy-Grammar[主语从句教学课件]
![人教新课标必修三 Unit 4 Astronomy-Grammar[主语从句教学课件]](https://img.taocdn.com/s3/m/7cb5439c02768e9950e738a2.png)
Is he coming or
not ？
We don’t know
We don’t know whether he is coming or not
Whether he is coming is not known.
What does he want
to tell us?
We don’t know what he wants to tell us.
We don’t know
What he wants to tell us is not known.
When will you come back?
It doesn’t matter.
When you will come back doesn’t matter.
It doesn’t matter when you will come back.
7.(__T_h_a_t_ the earth is a solid ball) is known to us all.
Conclusion: 主语从句作主语时，谓语动词一般用单数形式。
4. 主语从句需注意的问题 注 意：
1.“if” 不能引导主语从句，应有“whether”引导。 2.主语从句中用陈述语序 3.主语从句的 “that” 一般不能省。 4.“what”引导主语从句时，谓语动词： 1）常与其后的名词作表语一致 2）根据句子的语 境而定。
5. W__h_o_e_v_e_r_ leaves the room last ought to turn off the lights.
Make sentences
It’s certain . we’ll be late.
It’s certain that we will be late. That we’ll be late is certain.
高一英语必修三Unit4课文主语从句Microsoft PowerPoint 幻灯片
翻译：更为重要的是，地球冷却了下来， 地球的表面就开始出现了水。
It 是形 式主语
It was not immediately obvious
主语从句
that water was to be fundamental that water was to be fundamental to the of life. (L18-20) todevelopment the development of life. 句子可改为：
主语从句
Sowhether whether life will continue life will continue on on thethe earth for millions years to tocome come will earth for millions of years depend on whether this problem can be solved.（L50-51） 翻译：所以，在未来的数百万年中，生命 能否在地球上延续取决于这个问题能否得 到解决。
（L21-25）
翻译：很多科学家相信，由于地球上长期 有水存在，使地球得以把有害气体和酸性 物质溶解在海洋里。
主语从句
Why disappeared still Whythey they suddenly suddenly disappeared remains a mystery.(L41-42) 它们为什么会突然灭绝至今仍是个谜。
That water was to be fundamental to the development of life was not immediately obvious. 水对生命的发展会起到关键作用，这一点在 当时并entists scientists believe What believe is that the continued presence of water allowed the earth to dissolve harmful gases and acids into the oceans and seas.
人教版高中英语必修三 Unit 4 语法课件(共33张PPT)
The question is whether we can rely on him. That’s because we were in need of money at that time . He looked as if he was going to cry . That’s why I was late .
P64 USING STRUCTURE
Do you know where we come from? How did the universe begin? Read the passage and try to understand how Stephen Hawking solved the problems?
4. I hear they _h_a_v_e__r_e_t_u_rned (return) it already.
5. He said that they _h_a_d__b_e_e__n members of the Party since 1948. (be)
6. I didn’t know what time he __w__ro__t_e the letter. (write)
3. __W_h_y_ the universe exists the way it does is a major question to all those who have looked at stars like Hawking.
4. _W_h_a_t_ has developed over two thousand years of observation has to be greatly revised.
A. whether B. That C. what D. when
P64 USING STRUCTURE
Do you know where we come from? How did the universe begin? Read the passage and try to understand how Stephen Hawking solved the problems?
4. I hear they _h_a_v_e__r_e_t_u_rned (return) it already.
5. He said that they _h_a_d__b_e_e__n members of the Party since 1948. (be)
6. I didn’t know what time he __w__ro__t_e the letter. (write)
3. __W_h_y_ the universe exists the way it does is a major question to all those who have looked at stars like Hawking.
4. _W_h_a_t_ has developed over two thousand years of observation has to be greatly revised.
A. whether B. That C. what D. when
人教版高中英语必修三单元四Unit4主语从句(共16张PPT)
When and where he was born is not clear.
他何时何地出生的还不清楚。
When they will start and where they will go have not been decided yet.
他们将在什么时间动身以及要去哪里还没有定 下来。
1. It is likely that he is the winner of this game.
•
3.It＋be＋过去分词＋that从句
(said, reported, thought, expected, believed等) It is said that Mr.Green has arrived in Beijing.
据说格林先生已抵达北京。
4.It＋不及物动词＋that从句
(seem, happen等) It happened that I was out that day.
•
4、All that you do, do with your might; things done by halves are never done right. ----R.H. Stoddard, American poet做一切事都应尽力而为，半途而废永远不行6.17.20216.17.202110:5110:5110:51:1910:51:19
主语从句
一、定义 主语从句是在复合句中作句子的主语。
What I want is a new bicycle. 我想要的是一辆新自行车。
二、主语从句的引导词
1. 连词that, whether (1)that在从句中不作成分,无词义,不能省略 That she could come to help us made us very happy.
他何时何地出生的还不清楚。
When they will start and where they will go have not been decided yet.
他们将在什么时间动身以及要去哪里还没有定 下来。
1. It is likely that he is the winner of this game.
•
3.It＋be＋过去分词＋that从句
(said, reported, thought, expected, believed等) It is said that Mr.Green has arrived in Beijing.
据说格林先生已抵达北京。
4.It＋不及物动词＋that从句
(seem, happen等) It happened that I was out that day.
•
4、All that you do, do with your might; things done by halves are never done right. ----R.H. Stoddard, American poet做一切事都应尽力而为，半途而废永远不行6.17.20216.17.202110:5110:5110:51:1910:51:19
主语从句
一、定义 主语从句是在复合句中作句子的主语。
What I want is a new bicycle. 我想要的是一辆新自行车。
二、主语从句的引导词
1. 连词that, whether (1)that在从句中不作成分,无词义,不能省略 That she could come to help us made us very happy.
人教版高中英语必修三课件：Unit4主语从句(共23张PPT)
13、He who seize the right moment, is the right man.谁把握机遇，谁就心想事成。21.8.2521.8.2504:38:2904:38:29August 25, 2021
•
14、谁要是自己还没有发展培养和教育好，他就不能发展培养和教育别人。2021年8月25日星期三上午4时38分29秒04:38:2921.8.25
{ 导 主语 His job is important. What he does is important. 主语从句的定义：
在句中充当主语的从句叫做主语从句。
Subject Clauses 主语从句
思Task1: Find the sentences which are subject clause in the reading passage, then underline the subject clauses.
• ①It+be+__形__容__词____+that从句
(obvious, true, natural, surprising, wonderful, possible, likely, certain, probable)
• Eg:显然他撒谎了。
___It__w_a_s__o_b__v_i_o_u_s__t_h_a_t_h__e_t_o_l_d__a_l_i_e_.______
down, water began to appear on its surface. • 4. It was not immediately obvious that water was to be
fundamental to the development of life. • 5.What many scientist believe is that the continued
人教高中英语必修3Unit4主语从句 (共22张PPT)
要求：1.独立完成，限时1分钟； 2.合作交流，将小结写在学案纸上，以便
老师检查和展示，限时2分钟。
Period 4 Subject Clause （主语从句）
高效展示 1 要求： 1.举手抢题，派代表实物投 影展示答案，并解说，声音 艺要洪亮，表达要清晰。
2.其他同学注意观察、倾听， 做好订正补充的准备。
3、主语从句连接词及它们的用法 ----- 从句缺什么意思就用相应意思的连接词
主语从句 的连接词
某些连接词加-ever
小结3：主语从句的结构（留意句子3、8、9）
主语从句的结构
连接词 + 句子 连接词 + 谓语+其它
Period 4 Subject Clause （主语从句） 【当堂训练 1】
内容：通过观察理解主语从句的结构 任务：用横线划出句中的主语从句
要求：独立完成，限时3分钟
Period 4 Subject Clause （主语从句）
Period 4 Subject Clause （主语从句）
【当堂训练 2】
内容：在语境中正确使用连接词 任务：用正确的连接词填空 要求：小组讨论完成
将答案写在横线上，以便老师检查和展示。 限时8分钟。
Period 4 Subject Clause （主语从句）
高效展示 4 要求： 1.举手抢答，说出答案，声 音要洪亮，表达要清晰。
2).3). To find your way can be a problem.
4). Smoking is harmful to you. 5). What she said is not yet known. 6). That we shall be late is certain.
老师检查和展示，限时2分钟。
Period 4 Subject Clause （主语从句）
高效展示 1 要求： 1.举手抢题，派代表实物投 影展示答案，并解说，声音 艺要洪亮，表达要清晰。
2.其他同学注意观察、倾听， 做好订正补充的准备。
3、主语从句连接词及它们的用法 ----- 从句缺什么意思就用相应意思的连接词
主语从句 的连接词
某些连接词加-ever
小结3：主语从句的结构（留意句子3、8、9）
主语从句的结构
连接词 + 句子 连接词 + 谓语+其它
Period 4 Subject Clause （主语从句） 【当堂训练 1】
内容：通过观察理解主语从句的结构 任务：用横线划出句中的主语从句
要求：独立完成，限时3分钟
Period 4 Subject Clause （主语从句）
Period 4 Subject Clause （主语从句）
【当堂训练 2】
内容：在语境中正确使用连接词 任务：用正确的连接词填空 要求：小组讨论完成
将答案写在横线上，以便老师检查和展示。 限时8分钟。
Period 4 Subject Clause （主语从句）
高效展示 4 要求： 1.举手抢答，说出答案，声 音要洪亮，表达要清晰。
2).3). To find your way can be a problem.
4). Smoking is harmful to you. 5). What she said is not yet known. 6). That we shall be late is certain.
人教必修三unit4课文精讲ppt课件
whether从句为真正的主语，即Whether the shape would last or not
was not clear.
2. What it was to become was uncertain until between 4.5 and 3.8 billion years ago when the dust settled into a solid globe.
III. Fast-reading
1.Do you believe in such stories? Are they based on science?
2. In this unit, we’ll learn something more scientific. 3. What’s the title of the text?
• 在火星这些其他行星上都出现了水，但和地球不同的是，这些水 后来都消失了。水会对生命的发展起关键作用，这一点在当时并 不明显。
• be fundamental to 对...是重要的 • It 是形式主语，真正的主语是that water was to be fundamental
to the development of life. • It is/was(not) obvious that... ....是（不）明显的，如:
1. _W__h_a_t_s_u_r_p_r_i_se_d__e_v_e_ry_b__o_d_y_（使大家吃 惊的是）is that he didn’t come to the meeting.
2. _W__h__a_t _h_e_d_i_d_（他所做的） added to our difficulty.
and seas. This produced a chain reaction, which made it possible for
人教版高中英语必修三unit4语法(9张PPT)
*__It_i_s_r_e_p_o_r_t_e_d_t_h_a_t___(据报
道)20peoplewerekilledintheaccident.
*_I_ti_s_s_u_g__g_e_s_t_e_d_t_h_a_t_____(建
议)weshouldeatmorevegetableanddomoreex
e注rc意is3e：. 主语为从句时，谓语动词一般要用单数形 式；但如果what引导的从句做主语，并且代表复 数概念（常可从表语上看出），则谓语动词常用 复数形式
Whatweneed___i_s____water.我们所需要的是水。 Whatweneed________usefulbooks.我们所需要 的是一些有用的书a。re
高中英语课件
madeofcanruohanxing
SubjectClauses 主语从句
1.主语从句概念 主语从句就是从句在主句中作主语的名词性从句。
2.ConjunctionsofNounClauses(引导主语从句的
关联词):
从属连词 that,whether,（注意if不 (不作成分） 能引导）
连接代词 wቤተ መጻሕፍቲ ባይዱat,who,which,whom, （作成分） whose,wh+ever
连接副词 （作状语） when,where,how,why
3.主语从句注意事项
注意1：that在从句中只起连接作用，不充当句子 成分，且本身无实际意义。
whether在从句中起连接作用，不充当句子成分， 不能用if代替.
It’sapity/ashame//afact/goodnews/nowonder/ acommonknowledge…that…(遗憾的是/事实是/ 好消息//难怪/众所周知）
人教版高一英语必修三unit4 grammar -主语从句 公开课(共20张ppt)
It
Summary
1. 如何划定主语从句？（位置） 2. That引导主语从句意义及成分 3. What引导主语从句意义及成分 4. 如何选用连接词？ ① 找到谓语，确定从句 ② 根据句意直接选择（例如whether），或者分析从句成分，不缺
成分用that，缺主要成分用连接代词，缺状语用连接副词。
1. 连词that在从句中无实际意义，但放在句首不能省略。 改错：He will win is certain.
That
常犯错误：遗漏that。 注意： 主语从句的连接词不能省略，缺什么成分 补什么成分，不缺成分用that
2. Whether可以引导主语从句，但if不能。 3. 主语从句放在句末时，句首用形式主语it代替。 改错：He is said that he has gone to America.
• It hasn’t been decided yet when the new restaurant will open. • It is still not clear how gold was found here. • It is hard to understand why there is gravity. • It is a pity that you have to leave so soon.
talk about
the use of cell phone
What they are talking about is the use of cell phone.
Step 3 It作形式主语
勾出主语从句，并完成下列句子转换 • 1）That the earth is round is true. = It is true
________________________. • 2) Whether he will come hasn’t been decided. = It hasn’t been
Summary
1. 如何划定主语从句？（位置） 2. That引导主语从句意义及成分 3. What引导主语从句意义及成分 4. 如何选用连接词？ ① 找到谓语，确定从句 ② 根据句意直接选择（例如whether），或者分析从句成分，不缺
成分用that，缺主要成分用连接代词，缺状语用连接副词。
1. 连词that在从句中无实际意义，但放在句首不能省略。 改错：He will win is certain.
That
常犯错误：遗漏that。 注意： 主语从句的连接词不能省略，缺什么成分 补什么成分，不缺成分用that
2. Whether可以引导主语从句，但if不能。 3. 主语从句放在句末时，句首用形式主语it代替。 改错：He is said that he has gone to America.
• It hasn’t been decided yet when the new restaurant will open. • It is still not clear how gold was found here. • It is hard to understand why there is gravity. • It is a pity that you have to leave so soon.
talk about
the use of cell phone
What they are talking about is the use of cell phone.
Step 3 It作形式主语
勾出主语从句，并完成下列句子转换 • 1）That the earth is round is true. = It is true
________________________. • 2) Whether he will come hasn’t been decided. = It hasn’t been
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that 只有引导定从才做成分
• 5．what与that在引导主语从句时的区别 • what引导主语从句时在从句中充当成分，如
主语、宾语、表语等；that则不作任何成分， 只起连接作用。
• ①What has made him mad is not known yet. • (what在从句中作主语) • ②What you said yesterday is right. • (what在从句中作said的宾语) • ③That she is still alive is a consolation. • (that不作任何成分)
(引导名词性从句的关联词):
从属连词 that, whether, if，
(不作成分）
连接代词 what, who, whom, （作成分） whose, which, wh+ever 连接副词 when, where,why,how
（作状语）
9
1.引导词 that
that放在句首引导主语从句，在主语从句中 不充当任何成分也无实际意义。但是不能省略。
It + be + 名词 ＋ that从句
It is a pity that… It is a surprise that …. It is a fact that……
遗憾的是…… 令人惊奇的是…… 事实是……
It + 不及物动词 ＋ that从句
It appears/seems that… 似乎……
★_W__h_a_t he offers is what I need.
★ _W__h_at__ they are most interested in is
how they can produce more and better cars.
比较 that / what
1._W__h_a_t_ he wants is a book.
1)_W_h__a_t you said yesterday is right. 2)_T_h_a_t_ she is still alive is a comfort（安慰）.
3)_T_h_a_t_ he lost the bike worried him a lot.
4)_W__h_a_t caused the accident remains unknown. 5) _W__h_a_t matters was_w_h_a_t you choose. 6) _W__h_a_t we can’t get seems better.
地点状语
➢（W___h_e_r_e he will go）is unknown, maybe Xi’an.
原因状语
➢（_W__h_y_he did it like thi）s remains a mystery,
nobody knows the reason.
方式状语
➢（_H__o_w__ he solved the problem）is unknown.
3. What is needed for a long trip is careful
preparation. 该句中从句部分是 _W__h_a_t_i_s_n_e_e_d_e_d__fo_r__a _lo_n_g__t_r_ip__，junctions of Noun Clauses
课程：(Book3）Unit 4
Grammar 主语从句
(Book3）
What can you see in the picture?
What I can see is … What I can see is a face of a beautiful girl. What I can see is a face of a witch.
肯定… 重要的是… 很明显……
It + be + -ed分词 ＋ that从句
It is said that… It is suggested that… It is known to us/all that …. It has been decided that……
据说… 有人建议… 众所周知… 已经决定……
主语从句时，谓语动词用单数。
➢When we will go _h_a_s__(have) not been decided yet.
➢When and where we will go __h_a_s_( have) not been decided yet. ➢When we will go and where we will go h__a_v_e_(have) not been decided yet.
(be) a wonder. Where he will get a job after graduation
__p_u_z_z_le_s_/h_a_s_p_u_z_z_le_d__(puzzle) him much.
由and 连接两个或两个以上的主语从句作主语
时，谓语动词用复数；由两个或多个连接词引导一个
2. _T_h_a_t_ he wants to go there is obvious.
总结：名词性从句中
what
充当必要成分 如主语、宾语、表语
that 不做成分,无实际意义, 只起连接作用，但不
3.The first museum _t_h_a_t_能h省e略visi定ted语i从n 句
China was the History Museum.
★_T_h_a_t_the sun rises in the east and
sets in the west is known to all.
★她能来帮助我们使我们很高兴。
That she could come to help us made us very happy.
2.引导词 what
在从句中充当句子成分，如主语、宾语、表语等， 译为“...所...的”, 相当于the thing(s) that…, all that 或 everything that…
Find the subject of each sentence.
A book is on the desk.
n.
You are a student.
pron.
Smoking is bad for you.
verbal noun
To play basketball with him is a pleasant tinhfiinngit.ive phrase
It happens that ….
碰巧……
It occurred to sb. that…… 某人突然想起……
用it形式主语翻译下列句子:
1、学生学好英语很重要。
It is very important that students should learn English well.
时间状语
➢ （When he comes）depends on the bus.
3.主语从句中既充当句子成分， 也具备语义的引导词:
who(ever),whom(ever),whose, which(ever), what(ever), , 在主语从句中作主，宾，表，定
Whoever breaks the rules will be punished. Whoever comes to the party will receive a gift. Whatever he did was right.
What I can see is a face of a beautiful girl.
Subject Clause (主语从句)
Noun Clauses (名词性从句)
Object Clause （宾语从句）
Predicative Clause （表语从句）
Appositive Clause （同位语从句）
。
That we should learn English well is important.
It is important that we should learn English well.
Formal Subject
Real Subject
Whether you are right is uncertain.
2. Whether we will travel abroad or not
has not been decided. 该句中从句部分是 _W__h_e_t_h_e_r_w_e__w_i_ll___ _tr_a_v_e_l_a_b_r_o_a_d__o_r_n_o_t_，引导词为 __w_h_e_t_h_e_r_。
3.引导词 whether whether在主语从句不充当任何成分； 意为“是否”,主语从句中不可使用if.
Whether
________he'll take part in the game (or not ) is none of my business.
主语
_（__W__h_o_e_v_erbreaks the law s）hould be punished.
It is uncertain whether you are right.
Formal Subject
Real Subject
It + be + 形容词 ＋ that从句
It is certain that… It is important that …. It is obvious that……
4. 主语从句需注意的问题
从句中要用陈述语序 How does he become a great scientist? It puzzles him