英语语法-主语从句
九种英语主语从句

九种英语主语从句英语中的主语从句是一种句子结构,用来作为句子的主语。
它可以替代一个名词,在句子中起主语的作用。
以下是九种常见的英语主语从句:1. 以that引导的主语从句主语从句以that引导,用来表达它所引导的内容是主要的或重要的。
例如:That he arrived late was disappointing.2. 以whether或if引导的主语从句主语从句以whether或if引导,用来表达对某件事情的疑问或是不确定。
例如:3. 以疑问词引导的主语从句主语从句以疑问词引导,用来回答对某事情的问题。
例如:What she said was really surprising.4. 以动词不定式引导的主语从句主语从句以动词不定式引导,用来表达对某件事情的目的或意图。
例如:To finish the project on time is our main goal.5. 以-ing形式引导的主语从句主语从句以-ing形式引导,用来表达对某事情的现实、可能或不可能。
例如:Swimming in the pool is not allowed.6. 以从属连词that引导的主语从句主语从句以从属连词that引导,用来表达对某事情的描述、判断或信念。
例如:That he is a talented musician is well-known.7. 以it作为形式主语引导的主语从句主语从句以it作为形式主语引导,而真实主语通常位于句子后部。
例如:It is important to have a healthy lifestyle.8. 以as if / as though引导的主语从句主语从句以as if或as though引导,用来表达对某事情的比喻、相似或假设。
例如:He acted as if he knew everything.9. 以现在分词引导的主语从句主语从句以现在分词引导,用来表达对某事情的原因、结果或条件。
英语语法英语从句完全汇总

英语语法英语从句完全汇总一.主语从句主语从句是在复合句中充当主语的从句,通常放在主句谓语动词之前或由形式主语it代替,而本身放在句子末尾。
1.It作形式主语和it引导强调句的比较It作形式主语代替主语从句,主要是为了平衡句子结构,主语从句的连接词没有变化。
而it引导的强调句则是对句子某一部分进行强调,无论强调的是什么成分,都可用连词that。
被强调部分指人是也可用who/whom。
例如:It is a pity that you didn’t go to see the film.It doesn’t interest me whether you succeed or not.It is in the XXX.It is John that broke the window.2.用it作方式主语的布局1) It is +名词+从句It XXX…事实是…XXX…非常荣幸It is common knowledge that…是常识2) it is +形容词+从句It is natural that…很自然…It is XXX…奇怪的是…3) it is +不及物动词+从句It XXX…好像…It XXX…碰巧…4) it +过去分词+从句XXX…据报导…It XXX…已证实…3.主语从句不成位于句首的五种情形1) if引导的主语从句不可居于复合句句首。
2) It is said。
(reported)…结构中的主语从句不可提前。
例如:It is said that President Jingo will visit our school next week。
(right)That President Jiang will visit our school next week is said。
(wrong)(3) It happens…。
It occurs…结构中的主语从句不可提前。
例如:It occurred to him that he failed in the XXX)That he failed in the XXX)(4) XXX…结构中的主语从句不可提前。
英语主语从句

主语从句(一)主语从句的标记主语从句通常由连词that和whether (if)、连接代词或连接副词以及关系代词型what引导。
1. that引导That he is still alive is a wonder. 他还活着,真是奇迹。
That we shall be late is certain. 我们要晚了,这是确定无疑的。
That he should have ignored the working class was natural. 他忽视工人阶级是很自然的。
That she is still alive is a consolation. 她还活着是使人感到宽慰的。
That she became an artist may have been due to her father’s influence. 她成为画家可能是受她父亲的影响。
That you are coming to London is the best news I have heard this long time. 你将来伦敦是好久以来我听到的最好消息。
That she was chosen made a tremendous stir in her village. 她被挑选上,在她村子里引起很大轰动。
2. whether引导Whether it will do us harm remains to be seen. 是否对我们有害还要看一看。
Whether they would support us was a problem. 他们是否会支持我们还是一个问题。
3. 连接代词引导Whoever (=anyone who) fails to see this will make a big blunder. Whatever(=anything that) she did was reasonable. 无论什么Anything that she did was reasonable.Whichever (of you) comes in first will receive a prize. 无论(你们)谁先到都可以得奖。
英语从 主语从句语法

英语从主语从句语法主语从句是英语语法中的一个重要概念,它在句子中充当主语的角色,起到引导整个句子的作用。
掌握主语从句的使用方法,对于提高英语语言表达能力和句子结构的多样性有着重要的意义。
本文将详细介绍关于主语从句的语法规则和使用技巧,以帮助读者更好地理解和运用主语从句。
一、主语从句的定义和特点主语从句是一种从句类型,它由一个引导词引导,放在句子的主语位置,起到句子的主语作用。
主语从句可以是一个单词或词组,也可以是一个完整的句子。
主语从句通常由连接词that, whether/if, who, which, when, where, why等引导。
二、主语从句的语法规则1. 引导词that引导的主语从句主语从句中的引导词that常常被省略,特别是在口语和非正式的写作中。
例如:“It is important to study hard.”(努力学习很重要。
)2. 引导词whether/if引导的主语从句引导词whether/if经常用于引导主语从句,表达对某件事情进行选择或疑问。
例如:“Whether we should go hiking tomorrow is still under discussion.”(我们是否应该明天去徒步还在讨论中。
)3. 引导词who, which, what引导的主语从句这些引导词引导的主语从句通常涉及人或事物的具体内容,用来强调或描述主语。
例如:“Who will be the winner of the competition is still unknown.”(谁会成为比赛的获胜者,还是未知的。
)4. 引导词when, where, why引导的主语从句这些引导词通常用来引导时间、地点和原因状语从句,也可以用作主语从句。
例如:“When the concert will take place is yet to be announced.”(音乐会将在何时举行,尚未宣布。
2023年高中英语语法精讲,主语从句详细讲解

2023年高中英语语法精讲—主语从句详细讲解主语从句结构及用法在句子中担当主语的从句就叫做主语从句,通常放在主句谓语动词之前或由形式主语it代替,而本身放在句子末尾。
通常结构为“引导词 + 主语 + 谓语 + 其他成分"。
一. 概念:在句子中担当主语的从句就叫做主语从句,通常放在主句谓语动词之前或由形式主语it代替,而本身放在句子末尾。
主语从句使用陈述语序,其通常结构为“引导词 + 主语 + 谓语 + 其他成分", 但当连接代词同时充当从句主语时,其结构为“连接代词 + 谓语 + 其他成分”。
二. 引导词:1. that引导eg. That you are coming to London is the best news I have heard this long time.2. whether引导eg. Whether they would come to conference was a question.3. 连接代词引导: who,whom, whose, what, which, whoever, whomever, whichever, whatevereg. Whoever is top from wins the game when two matched players meet.4. 连接副词引导: therefore, besides, otherwise, however, moreover, still, thus, meanwhileeg. How this happended is not clear to anyone.5. 关系代词型what引导三. 形式主语it:1. 对关系代词型what引导的主语从句,可以使用形式主语。
eg. It is clear enough what he meant.2. 如果句子是疑问句,则必须用带形式主语it的结构.eg. Is it true that all of us need to to conference?如果一个句子在复合句中充当一个主语,那么这个句子就是主语从句。
高考英语主语从句知识点

高考英语主语从句知识点主语从句是英语语法中的一个重要知识点,也是高考中经常考察的内容之一。
掌握主语从句的使用方法和注意事项,对于提高语法准确性和阅读理解能力都非常有帮助。
本文将介绍主语从句的定义、使用时的注意事项以及一些常见的主语从句的句型。
一、主语从句的定义主语从句是指在一个句子中充当主语的从句。
它通常由连词that, whether或if引导,也可以由关系代词what, who, which,whom等引导。
二、主语从句的使用注意事项1.主语从句的用法多样化,可以表示陈述、疑问、建议、要求等不同的意义。
在使用时需要根据具体语境进行选择。
2.如果主语从句谓语动词是不及物动词,需要用it作形式主语。
例如:It is important that we study hard.3.在表示是否时,通常用whether或if引导主语从句。
例如:Whether you go or not is up to you.4.在表示疑问句时,常用疑问词引导主语从句。
例如:What you said is not clear.5.当主语从句与主句的主语一致时,可以用it作形式主语。
例如:It's a pity that you missed the party.三、常见的主语从句句型1.由that引导的主语从句。
例如:That he is rich is well known.2.由wh-词引导的主语从句。
例如:What she said is true.3.由whether或if引导的主语从句。
例如:Whether he will come to the party remains to be seen.4.由it作形式主语的主语从句。
例如:It doesn't matter whether you come or not.5.句型:It is + adj. + that从句。
例如:It is important that we protect the environment.四、主语从句的练习题1. ______ you have any questions, please feel free to ask. (whether/if)2. ______ he will pass the exam is still unknown. (that)3. ______ are you going to give your presentation? (where)4. ______ I owe you an apology is obvious. (that)5. ______ he is doing now is to prepare for the final exam. (what)答案:1. Whether2. That3. Where4. That5. What通过以上介绍,我们了解了主语从句的定义、使用注意事项以及常见的句型。
英语中的主语从句用法

英语中的主语从句用法在英语语法中,主语从句是一种非常常见的句型结构。
它由一个从句作为主句的主语,用来表示主句的主题或者主要动作。
主语从句的用法灵活多样,可以帮助我们表达复杂的思想和观点。
本文将探讨主语从句的用法,并举例说明其在不同语境中的应用。
一、主语从句的基本结构主语从句通常由连接词引导,常见的连接词有:that, whether, if, who, whom, whose, which, what, when, where, why等。
连接词在主语从句中起到引导从句的作用,使其成为主句的主语。
例如:1. That he is late again is not surprising.(他再次迟到并不令人惊讶。
)2. Whether she will come to the party is still uncertain.(她是否会来参加派对还不确定。
)3. If it rains tomorrow, we will stay at home.(如果明天下雨,我们会待在家里。
)二、主语从句的用法1. 表示事实或真理主语从句可以用来表达一些普遍的事实或真理,这些句子通常以that引导。
例如:1. That the earth revolves around the sun is a well-known fact.(地球绕着太阳转是一个众所周知的事实。
)2. That honesty is the best policy is universally recognized.(诚实是最好的策略是广为人知的。
)2. 表示观点或看法主语从句也可以用来表达个人观点或看法,这些句子通常以that或者连接代词what引导。
例如:1. That we should protect the environment is beyond doubt.(我们应该保护环境是毫无疑问的。
)2. What she said is completely true.(她说的完全是真的。
英语语法之主语从句

连接代词、连接副词和whether引导 的主语从句
• • • • • • • • How he knew this was still a mystery. (It was still a mystery how he knew this.) When she’ll be back depends much on the weather. (It depends much on the weather when she’ll be back.) Who is to head the delegation hasn’t been made public. (It hasn’t been made public who is to head the delegation.) Whether we’ll succeed remains to be seen. It remains to be seen whether we’ll succeed.
第二类:连接代词、连接副词和 whether (it做先行\形式主语)
• • • • • • C. 动词(+宾语或状语)+从句: It doesn’t matter much when we come back. It struck her how gentle he was being. D. 动词的被动语态+从句: Is it known who did it? It is being considered whether he should be dismissed.
第一类:that引导的主语从句
• • • • • • • A. be+形容词+从句: It was quite plain that she didn’t want to help us. How is it possible that a man can fall so low? It’s strange that he knows nothing about it. B. be+名词+从句: It’s a wonder that he got the first prize. It’s a pity that you haven’t seen the play.
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——主语从句
Underline the subject
1. Jane is good at playing the piano.(名词) 2. She went out in a hurry.(代词) 3. To see is to believe.(不定式) 4. Smoking is bad for health(. 动名词) 5. What he has said is true(. 从句)
结论:主语从句的语序要用序 主语从句连接词的使用 主谓一致 形式主语结构
Task1 连接词的使用
That he will pass the exam is certain.
Whether he will pass the exam is uncertain.
结论:
_t_h__a_t__不做成分,无意义,不可省略。 whether 不做成分,译为“__是__否___”,不可省略,
不能用 if 代替。
if 和 whether If ×
Whether the solid shape would last or not was not clear.
if It was not clear whether the solid shape would last.
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。.
Underline the subject clause
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.
结论:
who在主语从句中充当__主__语______;what在主语从句中充当__宾__语______; which在主语从句中充当__定__语______;whoever在主语从句中充当__主__语_____。
Task1 连接词的使用
When we will leave hasn’t been decided. Where the meeting will be held is not known. Why he cries is not clear. How she keeps healthy is a secret.
Task3 形式主语
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.
练习:
形式主语
That his invention will make people's life convenient is certain.
That students should work hard is natural.
结论: 引导主语从句在句首只能用whether, if只能放在句中。
Task1 连接词的使用
Who will go makes no difference. What we need is more time. Which book I shall choose hasn’t been decided. Whoever breaks the law will be punished.
结论:
When 在主语从句中充当___状___语____ ;where在主语从句中充当___状__语_____; why在主语从句中充当___状__语_____;how在主语从句中充当__状___语____。
归纳
缺什么补什么
功能
连接词
不作成分 that,whether 作主、宾、表、 what, who, whom, wh+ever
Task2 主谓一致
That he will pass the exam is certain. Which book I shall choose hasn’t been decided. How she keeps healthy is a secret.
结论: 当一个句子的主语是从句时,该句子的谓语用__单__数____。
注意
What I need ___is___ money.
What I need __a_r_e__ books.
结论:
Who you will go with ___i_s__ Lucy. Who you will go with __a_r_e__ the twins.
what和who 引导的从句做主语时,谓语的单复数取决它的__表___语___.
作定语
which, whose
作状语
when, where, why, how
Exercises
1. ___________ she is late is not clear. 2.____________we will hold the meeting is still a question. 3.___________they make in the factory are TV sets. 4.__________the accident happened will be looked into by the police. 5.___________I will spend the holiday is none of your business. 6. It is a pity___________ you can't attend my birthday party. 7. It is necessary __________ the problem should be solved at once.