高中英语主语从句(课堂PPT)
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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.
高中英语语法——主语从句课件(57张)
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.
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.
• What we need is more time.
• Which book I shall choose hasn’t been decided.
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.
_____ that 只起引导作用，本身无意义，不充当 任何分，但不能省略。 whether 不做成分，表“_______ 是否 ”。 在主语从句中只能用 _________, ___ whether 不能用if
引导词
2) 连接代词who, what, which • Who will go makes no difference.
1. 令人吃惊的是他改变了主意。 It is a surprise that he changed his mind. 2. 真可惜你错过了这么一个好机会。 It is a pity that you missed such a good chance. 3. 事实是我们周围的污染正变得越来越严重。 It is a fact that the pollution around us is becoming more and more serious.
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.
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.
• What we need is more time.
• Which book I shall choose hasn’t been decided.
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.
_____ that 只起引导作用，本身无意义，不充当 任何分，但不能省略。 whether 不做成分，表“_______ 是否 ”。 在主语从句中只能用 _________, ___ whether 不能用if
引导词
2) 连接代词who, what, which • Who will go makes no difference.
1. 令人吃惊的是他改变了主意。 It is a surprise that he changed his mind. 2. 真可惜你错过了这么一个好机会。 It is a pity that you missed such a good chance. 3. 事实是我们周围的污染正变得越来越严重。 It is a fact that the pollution around us is becoming more and more serious.
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
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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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汇报人：WPS
汇报时间：20X-XX-XX
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
高中英语语法——主语从句课件(57张)
理解主语从句
他通过了考试让老师很高兴。 He passed the exam. It made the teacher happy. He passed the exam made the teacher happy. That he passed the exam made the teacher happy.
理解主语从句
他何时要来还不清楚。 When will he come? It is not clear. When will he come is not clear. When he will come is not cleall succeed is certain. Whether he will come makes no difference. What we need is more time.
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. *______________(
1. 令人吃惊的是他改变了主意。 It is a surprise that he changed his mind. 2. 真可惜你错过了这么一个好机会。 It is a pity that you missed such a good chance. 3. 事实是我们周围的污染正变得越来越严重。 It is a fact that the pollution around us is becoming more and more serious.
• Whatever I have is yours.
• Whichever you want is yours.
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.
人教版高中英语必修五unit 2 grammar讲解——主语从句(共24张PPT).
A. What little B. So much C. How much D. So little
A
A. How B. Although C. Since D. While
A
3. The world’s greatest sporting event, the Olympic Games, upholds the amateur ideal that _____ matters is not winning but participating.
以主语从句作主语的主谓一致问题
Problems of concord with a nominal clause as subject
When the subject is a nominal clause introduced by what, who, which, how, etc, the verb usually takes the singular form. But when the subject complement is plural, or when the what-clause is plural in meaning, the verb of the main clause can be plural.
It is a pity that she has made such a decision.
It is no doubt that Mary will take over the business.
2. It is +a.+clause… obvious/certain/likely/~ing
7. why, how Why there is gravity is hard to understand. How he can earn a living in Britain remains a big problem.
A
A. How B. Although C. Since D. While
A
3. The world’s greatest sporting event, the Olympic Games, upholds the amateur ideal that _____ matters is not winning but participating.
以主语从句作主语的主谓一致问题
Problems of concord with a nominal clause as subject
When the subject is a nominal clause introduced by what, who, which, how, etc, the verb usually takes the singular form. But when the subject complement is plural, or when the what-clause is plural in meaning, the verb of the main clause can be plural.
It is a pity that she has made such a decision.
It is no doubt that Mary will take over the business.
2. It is +a.+clause… obvious/certain/likely/~ing
7. why, how Why there is gravity is hard to understand. How he can earn a living in Britain remains a big problem.
英语语法主语从句公开课课件讲解学习ppt
复习回顾本节课所学内容
小组合作完成练习册上的题目
准备下节课的学习内容
课后作业批改与反馈
课后作业批改方 式
错误点汇总及纠 正方法
学生作业完成情 况统计与分析
针对不同层次学 生提供个性化辅 导与建议
感谢观看
汇报人：WPS
理解主语从句的 时态和语序问题
结合实例深入剖 析主语从句的用 法和考点
总结课件亮点
内容丰富，覆盖面广 图文并茂，易懂易记 重点突出，难点突破 互动性强，参与度高
03
语法讲解
主语从句的定义
定义：一个句子作为主语 类型：三种类型：名词性从句，形容词性从句，副词性从句 构成：引导词+句子 注意事项：主谓一致，时态呼应
分析课件结构
课件封面：包含课程标题、讲师姓名等信息 课件目录：列出课程主要内容，方便学生了解课程结构 主语从句讲解：通过图片、表格等形式，形象展示主语从句的构成和用法 练习题：针对主语从句的用法和意义，设置相关练习题，便于学生巩固所学知识
讲解重点难点
理解主语从句的 构成和特点
掌握主语从句的 连接词用法
针对主语从句的省略和倒装进行 练习
添加标题
添加标题
添加标题
添加标题
针对主语从句的时态和语态进行 练习
设计一些与主语从句相关的作文 练习
要求学生背诵并默写主语从句的构成要素和用法说明
背诵主语从句的构成要素 和用法说明
默写主语从句的构成要素 和用法说明
完成相关练习题
掌握主语从句的用法和构 成要素
要求学生用自己的语言简述本节课的主要内容
06
课堂互动
提问与回答问题
老师提出问题，学生回答
学生之间互相提问，回答问题
小组合作完成练习册上的题目
准备下节课的学习内容
课后作业批改与反馈
课后作业批改方 式
错误点汇总及纠 正方法
学生作业完成情 况统计与分析
针对不同层次学 生提供个性化辅 导与建议
感谢观看
汇报人：WPS
理解主语从句的 时态和语序问题
结合实例深入剖 析主语从句的用 法和考点
总结课件亮点
内容丰富，覆盖面广 图文并茂，易懂易记 重点突出，难点突破 互动性强，参与度高
03
语法讲解
主语从句的定义
定义：一个句子作为主语 类型：三种类型：名词性从句，形容词性从句，副词性从句 构成：引导词+句子 注意事项：主谓一致，时态呼应
分析课件结构
课件封面：包含课程标题、讲师姓名等信息 课件目录：列出课程主要内容，方便学生了解课程结构 主语从句讲解：通过图片、表格等形式，形象展示主语从句的构成和用法 练习题：针对主语从句的用法和意义，设置相关练习题，便于学生巩固所学知识
讲解重点难点
理解主语从句的 构成和特点
掌握主语从句的 连接词用法
针对主语从句的省略和倒装进行 练习
添加标题
添加标题
添加标题
添加标题
针对主语从句的时态和语态进行 练习
设计一些与主语从句相关的作文 练习
要求学生背诵并默写主语从句的构成要素和用法说明
背诵主语从句的构成要素 和用法说明
默写主语从句的构成要素 和用法说明
完成相关练习题
掌握主语从句的用法和构 成要素
要求学生用自己的语言简述本节课的主要内容
06
课堂互动
提问与回答问题
老师提出问题，学生回答
学生之间互相提问，回答问题
高中英语语法-主语从句(共22张PPT)
Whom she borrowed money from still puzzled him. Which side will win is not clear. What she said today was quite right.
7
When he will be back depends on the weather. Where the test will be given is not yet decided. Where and when he was born is a secret. Why he came here is not known. How we can protect the endangered animals
turning white.
√ A. while B. that
C. if
D. for
5._______ he said at the meeting shocked
everybody present.
√A. What B. That C. The fact D. The matter
6._________ we can't get seems better than
9
四、it 可作形式主语
为了使句子保持平衡，避免头重脚轻,经常用 it 作形式 主语,主语从句放在后面作真正的主语. 其结构为：
It + 谓语动词/系动词 + 宾语/表语 + 主语从句. 例如:
That we shall be late is certain. = It is certain that we shall be late. 1. That the earth is round is known to all. = It is known to all that the earth is round. 2. whether they would support us was a problem . = It was a problem whether they would support10us.
7
When he will be back depends on the weather. Where the test will be given is not yet decided. Where and when he was born is a secret. Why he came here is not known. How we can protect the endangered animals
turning white.
√ A. while B. that
C. if
D. for
5._______ he said at the meeting shocked
everybody present.
√A. What B. That C. The fact D. The matter
6._________ we can't get seems better than
9
四、it 可作形式主语
为了使句子保持平衡，避免头重脚轻,经常用 it 作形式 主语,主语从句放在后面作真正的主语. 其结构为：
It + 谓语动词/系动词 + 宾语/表语 + 主语从句. 例如:
That we shall be late is certain. = It is certain that we shall be late. 1. That the earth is round is known to all. = It is known to all that the earth is round. 2. whether they would support us was a problem . = It was a problem whether they would support10us.
高中语法人教版英语《主语从句》课件(19张ppt)
例:
That we shall be late is certain.
-- It’s certain that we shall be late.
1. That the earth is round is known to all.
-- It’s known to all that the earth is round.
4. It’s known to us all ___ a form of energy .
A. water is C. is water
B. that water is D. that water to
5. It worried her a bit ___ her hair was turning gray.
• 2. The hope that she expressed is that they would come to visit China again. 定语从句
• 3.The fact that she works hard is well known
由 that 引导: 1. That we shall be late is certain. 2. _T_h_a_t__th_e__e_a_r_th__is__ro__u_n_d_ is known to all.
(地球是圆的) 3. _T_h_a_t_y_o_u__m_i_s_s_ed__t_h_e_c_h_a_n_c_e_ is a pity.
It 的用法： （形式主语）
It’ possible/important/necessary/clear… that……
很可能/重要的是…/必要的是…/很清楚…
It’s said/ reported… that..据说/据报道…
That we shall be late is certain.
-- It’s certain that we shall be late.
1. That the earth is round is known to all.
-- It’s known to all that the earth is round.
4. It’s known to us all ___ a form of energy .
A. water is C. is water
B. that water is D. that water to
5. It worried her a bit ___ her hair was turning gray.
• 2. The hope that she expressed is that they would come to visit China again. 定语从句
• 3.The fact that she works hard is well known
由 that 引导: 1. That we shall be late is certain. 2. _T_h_a_t__th_e__e_a_r_th__is__ro__u_n_d_ is known to all.
(地球是圆的) 3. _T_h_a_t_y_o_u__m_i_s_s_ed__t_h_e_c_h_a_n_c_e_ is a pity.
It 的用法： （形式主语）
It’ possible/important/necessary/clear… that……
很可能/重要的是…/必要的是…/很清楚…
It’s said/ reported… that..据说/据报道…
《主语从句超全》PPT课件
---
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.
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) ppt
这是否能让他们高兴很难说
2) 由连词that引起的主语从句： 引起的主语从句： That they are badly in need of help is quite clear. 他们急需帮助，这是十分明显的。 他们急需帮助，这是十分明显的。 引导主语从句只起引导作用， 注意 A: that 引导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， 无实际意义，在主语从句中不充当任何成分，但不 能省略。如果连词在句中则可省略that 能省略。如果连词在句中则可省略 注意B: 注意 但是这类句子在大多数情况下会放到整 个句子的后部去，而用代词 作形式主语 作形式主语。 个句子的后部去，而用代词it作形式主语。 = It is quite clear (that) they are badly in need of help.
用法： 用法：
1)由whether及其他连词引导的主语从 由 及其他连词引导的主语从 句放在句首，句后都可。 句放在句首，句后都可。
Whether it will please them is not easy to say. = It is not easy to say whether it will please them.
2. That you missed the chance is a pity. -- It is a pity that you missed the chance.
2. 用it 作形式主语的结构 A. It+be+形容词 形容词 (obvious, true, natural, surprising, good, wonderful, fu nny, possible, likely, certain, probable, etc.)+that从句。 从句。 从句 如： It is certain that she will do well in her exam. B. It+be+名词词组 名词词组 (no wonder, an honour, a good thing, a pity, no surprise , etc.)+that从句。如： 从句。 从句 It’s a pity that we can’t go.
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*_I_t _o_c_c_u_r_re_d__t_o_m__e_t_h_a_t_(我突然想起)I forget to sent the letter.
13
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 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
*__It_i_s_a__p_i_ty__th_a_t__(很遗憾)we lost the match.
It makes no difference whether
15
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
表语从句
The news that we won the game is exciting.
同位语从句
2
Noun Clauses (名词性从句)
Subject Clause (主语从句)
Object Clause （宾语从句）
Predicative Clause （表语从句）
Appositive Clause （同位语从句）
18
Complete the sentences using what, whether,
where, when， who, why, how or that.
1.(_W_h_a_t_ is needed for success) is your hard work. 2.( When/Howthey will arrive )has been told to the teacher. 3.( Where/whether we will go tomorrow )hasn’t been decided yet.
Subject Clause
引导主语从句在句首只能用whether, Conclusion: 有it作形式主语的whether/if都可以. 7
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. __I_t _is__im__p_o_s_s_i_b_le__th_a_t_h__e_w_i_ll_r_e_f_u_s_e_t_h_i_s_p_i_e_c_e __o_f_a_d_v_i_c_e_._____________________________
6
If ×
Whether the solid shape would last or not wa.s not clear.
if It was not clear whether the solid shape
would last or not.
Real Subject
Formed Subject
each other. ：If Mary really heard him is really doubtful. ：It was doubtful if Mary really heard him.
16
2.连接代词who ，what ，which, whatever, whichever, whoever What many scientists believe is that the continued presence of water …
It must be pointed out that…需指出的是……
*_I_t_i_s__re_p__o_r_te__d_t_h_a_t__(据报道)20 people were
killed in the accident.
*__It__is__s_u_g_g__e_s_t_e_d__th_a__t __(建议)we should eat
passengers_(s__h_o_u_l_d_)_b_e__s_e_a_r_c_h__e_d_.
12
3) It +不及物动词+从句
It happened that...
碰巧……
It occurred to me that…我突然想起…
*_I_t_h_a_p_p_e_n_e_d__t_h_a_t_(刚好)I came into the office at that time.
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。
20
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.
19
4.(_W__h_o__ can join in the sport meet) is decided by the teacher.
5.(_W__h_e_th_e_r_ it will rain or not) is not clear. 6. (_W__h_y the earth is becoming warm) is a good topic for research.
*__It_i_s_a__f_a_c_t _th_a_t_(这是事实)he cheated in the exam.
9
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… +(should) +do…
more vegetable and do more exercise. 14
• 5)“无关紧要（的是）”
It doesn’t matter
+主语从句
It makes no difference
• 翻译：一个人是否富有无关紧要
_It_d_o_e_s_n_’_t_m__a_tt_e_r_w_h__e_th_e_rone is wealthy or not.
It is strange that_h_e__s_h_o_u_l_d_n__o_t_c_o_m__e_.
我们做足够的运动很重要。 重要的是我们应该做足够的运动
It is important that we should do enough sports.
11
• ②表示“据建议、据要求、据命令” • It+be+suggested/advised/ordered/requested/ commanded/ insisted/required that… 谓语形式:should + V.原形 , should可省略. • 据命令，所有乘客必须接受搜查 _I_t_w_a__s_o_r_d_e__re_d__t_h_a_t_all the
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.
17
3)连接副词when，where， how， why等。
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……
*_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.
10
※ 主语从句的虚拟语气
①表 “应该，惊讶、惋惜、遗憾”等意义 It is important /natural /necessary/impossible/strange that... 谓语形式为:should + V.原形 , should可省略。 eg. 很奇怪，他竟没有来。
*it为形式主语
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.
8
这样就构成了下面一些常用句型: 1) It is + n. +从句
1
名词性从句的作用相当于名词，因此主语从 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。
13
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 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
*__It_i_s_a__p_i_ty__th_a_t__(很遗憾)we lost the match.
It makes no difference whether
15
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
表语从句
The news that we won the game is exciting.
同位语从句
2
Noun Clauses (名词性从句)
Subject Clause (主语从句)
Object Clause （宾语从句）
Predicative Clause （表语从句）
Appositive Clause （同位语从句）
18
Complete the sentences using what, whether,
where, when， who, why, how or that.
1.(_W_h_a_t_ is needed for success) is your hard work. 2.( When/Howthey will arrive )has been told to the teacher. 3.( Where/whether we will go tomorrow )hasn’t been decided yet.
Subject Clause
引导主语从句在句首只能用whether, Conclusion: 有it作形式主语的whether/if都可以. 7
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. __I_t _is__im__p_o_s_s_i_b_le__th_a_t_h__e_w_i_ll_r_e_f_u_s_e_t_h_i_s_p_i_e_c_e __o_f_a_d_v_i_c_e_._____________________________
6
If ×
Whether the solid shape would last or not wa.s not clear.
if It was not clear whether the solid shape
would last or not.
Real Subject
Formed Subject
each other. ：If Mary really heard him is really doubtful. ：It was doubtful if Mary really heard him.
16
2.连接代词who ，what ，which, whatever, whichever, whoever What many scientists believe is that the continued presence of water …
It must be pointed out that…需指出的是……
*_I_t_i_s__re_p__o_r_te__d_t_h_a_t__(据报道)20 people were
killed in the accident.
*__It__is__s_u_g_g__e_s_t_e_d__th_a__t __(建议)we should eat
passengers_(s__h_o_u_l_d_)_b_e__s_e_a_r_c_h__e_d_.
12
3) It +不及物动词+从句
It happened that...
碰巧……
It occurred to me that…我突然想起…
*_I_t_h_a_p_p_e_n_e_d__t_h_a_t_(刚好)I came into the office at that time.
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。
20
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.
19
4.(_W__h_o__ can join in the sport meet) is decided by the teacher.
5.(_W__h_e_th_e_r_ it will rain or not) is not clear. 6. (_W__h_y the earth is becoming warm) is a good topic for research.
*__It_i_s_a__f_a_c_t _th_a_t_(这是事实)he cheated in the exam.
9
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… +(should) +do…
more vegetable and do more exercise. 14
• 5)“无关紧要（的是）”
It doesn’t matter
+主语从句
It makes no difference
• 翻译：一个人是否富有无关紧要
_It_d_o_e_s_n_’_t_m__a_tt_e_r_w_h__e_th_e_rone is wealthy or not.
It is strange that_h_e__s_h_o_u_l_d_n__o_t_c_o_m__e_.
我们做足够的运动很重要。 重要的是我们应该做足够的运动
It is important that we should do enough sports.
11
• ②表示“据建议、据要求、据命令” • It+be+suggested/advised/ordered/requested/ commanded/ insisted/required that… 谓语形式:should + V.原形 , should可省略. • 据命令，所有乘客必须接受搜查 _I_t_w_a__s_o_r_d_e__re_d__t_h_a_t_all the
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.
17
3)连接副词when，where， how， why等。
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……
*_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.
10
※ 主语从句的虚拟语气
①表 “应该，惊讶、惋惜、遗憾”等意义 It is important /natural /necessary/impossible/strange that... 谓语形式为:should + V.原形 , should可省略。 eg. 很奇怪，他竟没有来。
*it为形式主语
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.
8
这样就构成了下面一些常用句型: 1) It is + n. +从句
1
名词性从句的作用相当于名词，因此主语从 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。