主语从句ppt课件
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人教高中英语必修3Unit3主语从句(共29张PPT)
1.何时开会还没有决定。 When the meeting will begin _h_a_s__ (have) not been decided yet . 2.他们何时出发和他们去哪里还没有决定。
When they will start and where they will go_a_r_e__(be)still unknown.
作状语
地状：where （哪里） 原状：why（为什么）
方式状语：how（怎样）
Challenge other students by asking any questions you can’t understand.你可以向其他 组的同学提出任何关于主语从句的问题。有效 提问其所在的组加1分，答对问题者其所在的 组加1分,否则提问者所在的组可再加1分。
4. 主语从句作主语时，谓语动词一般用单 数形式。 5.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,而把从句放在面. 4种句型。
1.我的收获： 2.我的遗憾及补救措施：
Write a short passage about your life in ten years including family, work and spare time life, using at least five subject clauses.
4) 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_i_s__re__p_o_r_te__d_t_h_a_t__(据报道)20 people were killed in the accident.
When they will start and where they will go_a_r_e__(be)still unknown.
作状语
地状：where （哪里） 原状：why（为什么）
方式状语：how（怎样）
Challenge other students by asking any questions you can’t understand.你可以向其他 组的同学提出任何关于主语从句的问题。有效 提问其所在的组加1分，答对问题者其所在的 组加1分,否则提问者所在的组可再加1分。
4. 主语从句作主语时，谓语动词一般用单 数形式。 5.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,而把从句放在面. 4种句型。
1.我的收获： 2.我的遗憾及补救措施：
Write a short passage about your life in ten years including family, work and spare time life, using at least five subject clauses.
4) 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_i_s__re__p_o_r_te__d_t_h_a_t__(据报道)20 people were killed in the accident.
高中英语主语从句讲解课件(共36张PPT)
2.That they should like each other is natural. _I_t _is__n_a_tu__ra_l_t_h_a_t_t_h_e_y_s_h_o_u__ld__li_k_e_e_a_c_h__o_th__er.
这样就构成了下面一些常用句型: 1) It is + n. +从句
(四). 判断以下句子是否正确： They should like each other is natural. 错误
That they like each other is natural. 正确
It is natural that they like each other. 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。
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.
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
这样就构成了下面一些常用句型: 1) It is + n. +从句
(四). 判断以下句子是否正确： They should like each other is natural. 错误
That they like each other is natural. 正确
It is natural that they like each other. 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。
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.
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
主语从句课件.ppt
二、找出下面句子的主语。
That I can enter a key university is my dream.
What he did made me extremely angry. Whether we will go picnicking tomorrow depends on the weather.
8. What you need is more practice. 主句谓语是___i_s____, what在从句中充____宾__语_______
9. How he became a famous musician is known to all. 主句谓语是__is__k_n_o_w__n, how在从句中充___方__式__状__语_____
2.从句若缺主/宾/定，就考虑_代__词____
3.若从句不缺主/宾/定，再看意思上是否缺状语,
就考虑__副__词____
4. 若从句都不缺主/宾/定/状，则考虑 _t_h_a_t/_w_h_e_t_h_e_r_
W__h_i_c_h team will win the game is the focus of this moment. _W__h_e_n___ he will be back ends on the weather W__h__et_h_e_r_he will help them is not easy to say..
3. 有词义的并且在从句中充当成分的词：
在从句中充当_主_语__ 用 who, what, which 宾__语__用whom, what, which 代词 _定_语__用whose, which
在从句中充当_状_语__用when, where, why, how 副词
高中语法主语从句优秀课件
2 I_t_i_s_b_e__li_e_v_e_d__th__a_t__(人们相信)we should eat more vegetable and do more exercise.
【Pay attention to that, whether/if,what, 】 1. that 在主语从句只起引导作用，本身无实 际意义，在主语从句中不充当任何成分，但 不能省略。 2. whether/if "是否" 在主语句中不做成分， 不能省略，放句首只能用whether, 不能用if. 3.what引导的主语从句除了起到引导从句的 作用外，还要承担具体的意义，what还会作 句子成分。
pronoun代词
5. That we will be late is certain.
6. It is certain that we shall be late. A sentence served as(充当) subject is called
Subject Clause.
【例句呈现】 观察下列例句，指出其中所包含的主语 从句及连接词: 1. What is needed for a long trip is careful preparation. 该句中主语从句是 _W__h_a_t_i_s_n_e_e_d_e_d_f_o_r_a_ _l_o_n_g_t_r_ip__，连接词为 _w_h_a_t_。
2. That Taylor Swift will come to my city
excites everybody. 该句中主语从句是 _T_h_a_t_T_a_y_l_o_r_S_w__if_t_will c_o_m__e_t_o_m__y_c_i_ty__，连接词为__th_a_t_。 3. Whether we will travel abroad or not
【Pay attention to that, whether/if,what, 】 1. that 在主语从句只起引导作用，本身无实 际意义，在主语从句中不充当任何成分，但 不能省略。 2. whether/if "是否" 在主语句中不做成分， 不能省略，放句首只能用whether, 不能用if. 3.what引导的主语从句除了起到引导从句的 作用外，还要承担具体的意义，what还会作 句子成分。
pronoun代词
5. That we will be late is certain.
6. It is certain that we shall be late. A sentence served as(充当) subject is called
Subject Clause.
【例句呈现】 观察下列例句，指出其中所包含的主语 从句及连接词: 1. What is needed for a long trip is careful preparation. 该句中主语从句是 _W__h_a_t_i_s_n_e_e_d_e_d_f_o_r_a_ _l_o_n_g_t_r_ip__，连接词为 _w_h_a_t_。
2. That Taylor Swift will come to my city
excites everybody. 该句中主语从句是 _T_h_a_t_T_a_y_l_o_r_S_w__if_t_will c_o_m__e_t_o_m__y_c_i_ty__，连接词为__th_a_t_。 3. Whether we will travel abroad or not
主语从句公开课PPT课件
主语从句可以包含丰富的信息， 包括时间、地点、条件、原因等
，使表达更加准确具体。
通过主语从句可以精确地描述某 个事件或情况，避免歧义和误解
。
主语从句还可以用来表达复杂的 观点和态度，使文章更具深度和
说服力。
增加文采和感染力
主语从句可以采用多种句式和表达方 式，如倒装句、强调句等，增加文章 的文采和感染力。
连接代词和连接副词引导的主语从句一般放在句首，谓语动词用单数形式。
连接代词what和which在引导主语从句时，有时可以互换使用，但which更强调选 择范围。
主语从句时态、语态和语气
03
问题
时态问题
主语从句时态与主句时态一致
01
主语从句中的动词时态通常与主句中的动词时态保持一致，表
示同时发生的动作或状态。
当主语从句中的主语是表示数量的短语（如a number of, the majority of等）时，谓 语动词的单复数形式取决于短语所修饰的名词。
主语从句中的主语是并列结构时，谓语动词用复数形式
当主语从句中的主语是由and连接的并列结构时，谓语动词用复数形式。
练习题讲解
选择题
通过选择题的形式， 让学生判断主语从句 中主谓一致问题的正
当主语从句中的主语是复数形式时，谓语动词必须与主语保持一致，也用复数形式。
特殊情况处理方法
主语从句中的主语是不定代词时，谓语动词用单数形式
当主语从句中的主语是不定代词（如something, nothing, anyone等）时，谓语动词 用单数形式。
主语从句中的主语是表示数量的短语时，谓语动词用单数或…
主语从句与形式主语的区分
形式主语it代替真正的主语从句，使句子结构更加平衡。需注意形 式主语与真正主语的区分。
主语从句公开课课件
It is certain that he will win the match.
注解：一般来说主语从句都是放在 句首 , 但有时为了使句子 保持平衡 ,避免”头重脚轻”, 常用 it 作 形式主语 ，从而把主语从句放在 后面 ．
这样就构成了下面一些常用句型: 1) It is + n. +that It is a pity/shame that... 可惜的是…… It is a surprise that… 令人吃惊的是… It is a fact that… 事实是… It is common knowledge that … …是常识 *_______________( It is a pity that 很可惜)we lost the match. *______________( It is a fact that 这是事实)he cheated in the exam.
引导词
3)连接代词whoever, whatever, whichever • Whoever comes is welcome. • Whatever I have is yours. • Whichever you want is yours.
whatever=anything that whoever=anyone who
•主语从句的特点：
1.引导词：
从属连词 that, whether；
连接代词 who, what, which；
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whoever, whatever, whichever; 连接副词 when, where, how和why。 2. 语序：陈述句语序
That he will win the match is certain.
人教版英语--主语从句公开课获奖课件百校联赛一等奖课件
decided. • How she can keep healthy is a secret. • Whether he will come is not very
important.
引导主语从句旳关联词有三类：
1) 隶属连词that
如: That they were true sisters was clear from the facial
It is a pity/shame that... 遗憾旳是…… It is a surprise that…令人惊奇旳是… It is a fact that… …是事实 It is common knowledge that… …是常识
*__It_i_s_a__p_i_ty__th_a_t__(很遗憾)we lost the match.
*_I_t_i_s_p_o_s_s_i_b_le__th__a_t _(很可能)she will come back tomorrow. *__It_i_s_o__b_v_io_u_s__th__a_t _(很明显)this measure is
effective.
3) It + be +过去分词+从句
主语
同位语
宾语
名词在句中主要作主语、宾语、表语和同位语 。
什么是名词性从句?
在英语旳句子构造中，原来该由名词充当旳主语、宾 语、表语和同位语，由一种句子来充当,这个句子就叫 名词性从句。
主语从句 ( The Subject Clause)
宾语从句 ( The Object Clause)
表语从句 ( The Predicative Clause)
主语从句三要素
How he became a great scientist is known to us all. what you told me is true.
important.
引导主语从句旳关联词有三类：
1) 隶属连词that
如: That they were true sisters was clear from the facial
It is a pity/shame that... 遗憾旳是…… It is a surprise that…令人惊奇旳是… It is a fact that… …是事实 It is common knowledge that… …是常识
*__It_i_s_a__p_i_ty__th_a_t__(很遗憾)we lost the match.
*_I_t_i_s_p_o_s_s_i_b_le__th__a_t _(很可能)she will come back tomorrow. *__It_i_s_o__b_v_io_u_s__th__a_t _(很明显)this measure is
effective.
3) It + be +过去分词+从句
主语
同位语
宾语
名词在句中主要作主语、宾语、表语和同位语 。
什么是名词性从句?
在英语旳句子构造中，原来该由名词充当旳主语、宾 语、表语和同位语，由一种句子来充当,这个句子就叫 名词性从句。
主语从句 ( The Subject Clause)
宾语从句 ( The Object Clause)
表语从句 ( The Predicative Clause)
主语从句三要素
How he became a great scientist is known to us all. what you told me is true.
主语从句公开课PPT
添加 标题
主语从句可充当句子的主语。
添加 标题
主语从句的语序：为了避免头重脚轻，通常把形式主语it放在句首位置，真正主语放在句末。
添加 标题
主语从句在句中起名词性作用，是一个完整的句子，表达完整的意思，引导主语从句的词语除that、 whether以及疑问词外，连词if、whether和关系代词who、whom、whose、what、which等在主语从句中 不充当任何成分。
主语从句与形式 主语it的区别
主语从句的时态问题
主语从句的时态要与主句保持 一致
主句是现在时，从句可以用任 何时态
主句是过去时，成时，从句要用 过去的相应时态
主语从句的练习与解析
主语从句的专项练习
判断题：分析句 子结构，判断是 否为主语从句
改错题：找出句 子中的错误并进 行修改
副词性从句
写作中主语从句 的作用：使文章 更加生动、具体， 丰富文章的内容， 避免冗长和复杂
句式
写作中使用主语 从句的注意事项： 主语从句的连接 词选择要恰当， 主语从句的时态 要正确，主语从 句的主谓要一致。
总结与展望
主语从句的重要性和应用价值
掌握主语从句的引导词
理解主语从句的时态和语序
理解主语从句的定义和构成
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主语从句公开课 PPT
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主语从句简介
主语从句的常见 问题
主语从句的基本 形式
主语从句的练习 与解析
主语从句的用法 总结与展望
主语从句简介
什么是主语从句
分类：根据引导词的不同， 主语从句可分为三类
高考英语名词性从句之主语从句精讲(含例题) 课件36张PPT
总结：连接代词引导主语从句的用法
连接代词
1. 作用：连接主句和从句，在从句中充当主语、宾语、表语、定语
2. 分类: 充当主、宾、表：what(ever), who(ever), whom(ever)
充当定语：which(ever), whose
3. 与连接词对比
对比 相同点
连接词
连接代词
都起连接主从句的作用
地点状语：where, wherever 方式状语：how, 原 因 状 语 ： w h y,
时间类关系副词：when, whenever
when 指...的时间，在从句中做时间状语
When the speech contest will be held still needs to be discussed. 演讲比赛举办的时间还需要再讨论。 Whenever you want to come is fine with me. 无论什么时候你想来我都可以。
s方uc式ce状ed语is：cheortwain . frightened her.
在句中充当状语 Why the sun rises in the east is interesting.
原因状语：why
思考：如何选择主语从句连接词？
1. 找到从句标出来 2. 判断从句何类型 3. 判断是否缺成分 4. 判断用何连接词
whether / if 引导主语从句的区别
相同点 1. 都表示“是否” 2. 在从句中没有充当成分 3. 起连接作用 4. 可用it做形式主语，从句放句尾
区别
1. whether引导的主语从句可以放在句首 Whether the plan will be carried out is still unknown.
英语语法(主语从句)公开课课件
whatever=anything that whoever=anyone who
引导词
4) 连接副词when, where, how ,why • When we will leave hasn’t been decided. • How she keeps healthy is a secret.
这样就构成了下面一些常用句型: 1) It is + n. +that It is a pity/shame that... 可惜的是…… It is a surprise that… 令人吃惊的是… It is a fact that… 事实是… It is common knowledge that … …是常识 It is a pity that 很可惜)we lost the match. *_______________( It is a fact that 这是事实)he cheated in the exam. *______________(
Whether he will come makes no difference. What we need is more time.
引导词
1) 从属连词that和whether： • That he will come is certain. • Whether he will come is uncertain.
2. What he needs ____some books. are
规律五、what 引导的主语从句，可根据 表语决定主句动词的单复数形式。
他是不是我的孩子仍然是个问题。 Whether he is my child remains a question.
我最喜欢的 是你的发型。
引导词
4) 连接副词when, where, how ,why • When we will leave hasn’t been decided. • How she keeps healthy is a secret.
这样就构成了下面一些常用句型: 1) It is + n. +that It is a pity/shame that... 可惜的是…… It is a surprise that… 令人吃惊的是… It is a fact that… 事实是… It is common knowledge that … …是常识 It is a pity that 很可惜)we lost the match. *_______________( It is a fact that 这是事实)he cheated in the exam. *______________(
Whether he will come makes no difference. What we need is more time.
引导词
1) 从属连词that和whether： • That he will come is certain. • Whether he will come is uncertain.
2. What he needs ____some books. are
规律五、what 引导的主语从句，可根据 表语决定主句动词的单复数形式。
他是不是我的孩子仍然是个问题。 Whether he is my child remains a question.
我最喜欢的 是你的发型。
主语从句(11张PPT)
4.__W_h_e_t_h_e_r it will rain or not is not clear. 5. W__h__y the earth is becoming warm is a good topic for research.
Conclusion: 1 主语从句作主语时，谓语动词一般用单数形式。
Noun clauses as the subject
主语从句
Revision
Find the subjects in the following sentences.
1. A tree has been cut down. 2. You are a student. 3. To study English well can be difficult. 4. Smoking is harmful to our health. 5. What she said is not yet known.
3. 用it作形式主语的主语从句 (1) It is + adj + that... 很明显，那个女孩在说谎
It is obvious that the girl is telling lies.
(2) It is + n + that... 很遗憾你不能和我们一起去
(3) It is + 过去分词 + that... 据说他去过美国
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。
2.That they should like each other is natural. I_t _is__n_a_tu_r_a_l_t_h_a_t_t_h_e_y_s_h_o_u_l_d_l_ik_e__e_a_c_h__o_th_e_r_.
Conclusion: 1 主语从句作主语时，谓语动词一般用单数形式。
Noun clauses as the subject
主语从句
Revision
Find the subjects in the following sentences.
1. A tree has been cut down. 2. You are a student. 3. To study English well can be difficult. 4. Smoking is harmful to our health. 5. What she said is not yet known.
3. 用it作形式主语的主语从句 (1) It is + adj + that... 很明显，那个女孩在说谎
It is obvious that the girl is telling lies.
(2) It is + n + that... 很遗憾你不能和我们一起去
(3) It is + 过去分词 + that... 据说他去过美国
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。
2.That they should like each other is natural. I_t _is__n_a_tu_r_a_l_t_h_a_t_t_h_e_y_s_h_o_u_l_d_l_ik_e__e_a_c_h__o_th_e_r_.
《主语从句超全》PPT课件
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第二讲：主语从句的引导词及各 类主语从句
主语从句在复合句中作句子的主语。 引导主语从句的词有从属连词that, whether, if；连接代词who, whoever, whom, what, whatever, whose, which； 连接副词when, where, how, why等。
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2. That Jay Zhou will come to my city excites everybody. 该句中主语从句是 _T_h_a_t_J_a_y__Z_h_o_u__w_i_ll_ _c_o_m_e__to__m_y__c_it_y_，引导词为__th_a_t_。
3. Whether we will travel abroad or not has not been decided. 该句中主语从句是 _W__h_e_t_h_e_r_w__e_w__il_l __ _tr_a_v_e_l_a_b_r_o_a_d__o_r_n_o_t_，引导词为 _w_h__et_h_e_r__。
Noun clauses as the subject
句子
简单句 复合句
并列句
形容词性从句 名词性从句
副词性从句
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定语从句
主语从句 subject clause
宾语从句 object clause
表语从句 predicative clause
同位语从句 appositive clause
比较状语从句 地点状语从句 时间状语从句 让步状语从句 条件状语从句 目的状语从句 方式状语从句 结果状语从句 原因状语从句
It is common knowledge that… …是常识
*_It__is__a__p_it_y__th__a_t_(很遗憾)we lost the match.
第二讲：主语从句的引导词及各 类主语从句
主语从句在复合句中作句子的主语。 引导主语从句的词有从属连词that, whether, if；连接代词who, whoever, whom, what, whatever, whose, which； 连接副词when, where, how, why等。
---
2. That Jay Zhou will come to my city excites everybody. 该句中主语从句是 _T_h_a_t_J_a_y__Z_h_o_u__w_i_ll_ _c_o_m_e__to__m_y__c_it_y_，引导词为__th_a_t_。
3. Whether we will travel abroad or not has not been decided. 该句中主语从句是 _W__h_e_t_h_e_r_w__e_w__il_l __ _tr_a_v_e_l_a_b_r_o_a_d__o_r_n_o_t_，引导词为 _w_h__et_h_e_r__。
Noun clauses as the subject
句子
简单句 复合句
并列句
形容词性从句 名词性从句
副词性从句
---
定语从句
主语从句 subject clause
宾语从句 object clause
表语从句 predicative clause
同位语从句 appositive clause
比较状语从句 地点状语从句 时间状语从句 让步状语从句 条件状语从句 目的状语从句 方式状语从句 结果状语从句 原因状语从句
It is common knowledge that… …是常识
*_It__is__a__p_it_y__th__a_t_(很遗憾)we lost the match.
主语从句PPTPPT课件.ppt
注意： (1)从句作主语谓语动词常用单数，但如果 what 引导的从句作主语，后跟名词作表语 时，谓语动词则由表语名词的数量决定。 What he told me is true. 他告诉我的是真的。 What he saw were some new comers. 他看见的是些新来的人。
(2)It is said that sb.do sth.的复合句形式可转化为简单句sb.be said to do sth.， 而且在简单句中常考查 to do 的具体形式。 (3)it 引导的强调句与 it 作形式主语的复合句的区别。 it 引导的强调句是用来对句中除谓语外某一成分加以强调，其结构为“It is/was＋ 被强调部分＋that/who...”。如果被强调的主语是“人”，则可用 who 或 that， 如果被强调的部分是其他成分时，必须用 that。 It was I that/who met John in the street yesterday. 是我昨天在街上遇到了约翰。(强调主语) It is a pity that you didn't go to see the film. 你没去看电影很可惜.ppt
演讲人
1．主语从句位于句首。 Who kept the door open all night was unknown. 不知道是谁让门整晚开着。 2．主语从句位于句尾，使用it作形式主语。 it作形式主语置于句首的结构 (1)“It＋be＋形容词＋that clause”结构，常用于这种句型的形容词有： fortunate，possible，(un)likely，strange，probable，true，certain等。 It is strange that no one wants to go there. 真奇怪，竟然没有人想要去那里。
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It doesn’t matter whether she will come or not.
It makes no difference where we shall have the meeting.
.
3) It +及物动词（被动语态）+主语从句
It has been decided that the exhibition will not open on Sundays.
注意:
1）主语从句在句首时，必须由连接词引导， 不能省略这些连接词；但是如果用it做形式 主语，而把主语从句放在句末时，从属连词 that可以省略。
.
4) . 用于It is important / natural / necessary / impossible that...句型中, 主语从句应使用虚 拟语气, 谓语动词用\“should + 动词原形\”的 形式, shou?” is a greeting. What she said is not yet known. That we shall be late is certain. It is certain that we shall be late.
.
主语从句 （Noun Clauses as the Subject）
.
It is certain that she will do well in her exam. It is true that I told her everything. It is said that Mr. Green has arrived in Beijing. It is reported that China has sent another manmade earth satellite into orbit.
Noun Clauses ---The subject clause
By Debby
.
Grammar
What part does the underlined part serve as in each sentence?
A tree has fallen across the road. You are a student. To find your way can be a problem. Smoking is bad for you.
2)连接代词who ，what ，which, whatever, whichever, whoever
充当成分，有具体意义
What seems easy to some people seems difficult to others. Which side will win is not clear.
.
2）It+不及物动词+主语从句 It seemed (happened, doesn’t matter, has turned out) that…
It happens that they were absent. It seems that Alice is not coming to the party at all.
.
主语从句常用it作形式主语放句首
因而我们常见到这种句式： It+be+n./adj/-ed从句（that,
whether,etc.) 例：It's a pity that you should have
to leave. = That you should have to leave is a pity. It is great that I have a teacher like you. = That I have a teac. her like you is
3)连接副词when，where， how， why等。
Why he did it remains a mystery. When they will start is not known yet. How he became a great scientist is known to us all.
2.That he will come and help us is certain. 3.Whether we will succeed is still a
question. 4.It is not known if he will come.
注意: 已确定的事由that引导; 没决定的事由whether引导.
5) 在It +
be+suggested/advised/ordered/requested/ insisted/required 中, that从句的谓语也应
该用\“should + 动词原形\”的形式, should有 时可以省略。
.
3. 主语从句需注意的问题 (1)主语从句中用陈述语序 What she is afraid of is their taking her to Paris. ( What is she afraid of … Wrong ) (2)主语从句后谓语动词用三人称单数 That they haven’t phoned is strange.
定义： 用作主语的从句叫主语从句，它是名
词性从句之一。引导主语从句的连接词有：
连词that, whether；连接代词who, what和which；连接副词when, where, how和why。
.
主语从句的连接词
1.连词 that(无 词 义 , 不 作 成分 , 不 能 省 略);whether(是否),if不能位于句首。
.
2.位置： 主语从句可以前置，也可以 后置。用it做形式主语，而把主语从 句，在句末，常用下面几种句型。
1）It + be + 表语 +主语从句 表语：（名词， 形容词，过去分词）
It is a fact (a shame, a pity, good news…) that…
It is still uncertain whether he is coming or not. It is an honour that I was invited to attend the meeting.
It makes no difference where we shall have the meeting.
.
3) It +及物动词（被动语态）+主语从句
It has been decided that the exhibition will not open on Sundays.
注意:
1）主语从句在句首时，必须由连接词引导， 不能省略这些连接词；但是如果用it做形式 主语，而把主语从句放在句末时，从属连词 that可以省略。
.
4) . 用于It is important / natural / necessary / impossible that...句型中, 主语从句应使用虚 拟语气, 谓语动词用\“should + 动词原形\”的 形式, shou?” is a greeting. What she said is not yet known. That we shall be late is certain. It is certain that we shall be late.
.
主语从句 （Noun Clauses as the Subject）
.
It is certain that she will do well in her exam. It is true that I told her everything. It is said that Mr. Green has arrived in Beijing. It is reported that China has sent another manmade earth satellite into orbit.
Noun Clauses ---The subject clause
By Debby
.
Grammar
What part does the underlined part serve as in each sentence?
A tree has fallen across the road. You are a student. To find your way can be a problem. Smoking is bad for you.
2)连接代词who ，what ，which, whatever, whichever, whoever
充当成分，有具体意义
What seems easy to some people seems difficult to others. Which side will win is not clear.
.
2）It+不及物动词+主语从句 It seemed (happened, doesn’t matter, has turned out) that…
It happens that they were absent. It seems that Alice is not coming to the party at all.
.
主语从句常用it作形式主语放句首
因而我们常见到这种句式： It+be+n./adj/-ed从句（that,
whether,etc.) 例：It's a pity that you should have
to leave. = That you should have to leave is a pity. It is great that I have a teacher like you. = That I have a teac. her like you is
3)连接副词when，where， how， why等。
Why he did it remains a mystery. When they will start is not known yet. How he became a great scientist is known to us all.
2.That he will come and help us is certain. 3.Whether we will succeed is still a
question. 4.It is not known if he will come.
注意: 已确定的事由that引导; 没决定的事由whether引导.
5) 在It +
be+suggested/advised/ordered/requested/ insisted/required 中, that从句的谓语也应
该用\“should + 动词原形\”的形式, should有 时可以省略。
.
3. 主语从句需注意的问题 (1)主语从句中用陈述语序 What she is afraid of is their taking her to Paris. ( What is she afraid of … Wrong ) (2)主语从句后谓语动词用三人称单数 That they haven’t phoned is strange.
定义： 用作主语的从句叫主语从句，它是名
词性从句之一。引导主语从句的连接词有：
连词that, whether；连接代词who, what和which；连接副词when, where, how和why。
.
主语从句的连接词
1.连词 that(无 词 义 , 不 作 成分 , 不 能 省 略);whether(是否),if不能位于句首。
.
2.位置： 主语从句可以前置，也可以 后置。用it做形式主语，而把主语从 句，在句末，常用下面几种句型。
1）It + be + 表语 +主语从句 表语：（名词， 形容词，过去分词）
It is a fact (a shame, a pity, good news…) that…
It is still uncertain whether he is coming or not. It is an honour that I was invited to attend the meeting.