it做形式主语的主语从句

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it做形式主语时的用法

It作为形式主语时，常常用于代替后面真实主语的从句、动名词或不定式，以避免句子结构显得过于复杂或者不平衡。以下是It 作为形式主语的几种常见用法：

1、It + be + 形容词 + that从句：这种句型中的形容词通常是表示性格、品质的形容词，如nice、kind、stupid等。例如：It is kind of you to help me. 你真好，帮了我。

2、It + be + 名词 + that从句：这种句型中的名词通常是表示时间、距离、度量衡等概念的名词。例如：It is five years since we last met. 我们上次见面已经五年了。

3、It + be + 介词短语/副词 + that从句：这种句型中的介词短语或副词通常用来描述地点、方式等。例如：It is in this room that we had the party. 我们就是在这个房间里开派对的。

4、It + be + 动词的过去分词 + that从句：这种句型中的动词过去分词通常是表示完成的动词，如known、heard、seen等。例如：It is said that he has gone abroad. 据说他已经出国了。

5、It + be + 不定式短语/动名词 + that从句：这种句型中的不定式短语或动名词通常用来描述将来的动作或一般性的情况。例如：It is to study hard that he will succeed. 他只有努力学习才会成功。

it做形式主语用法大全

It作形式主语常见句型

动词不定式，动名词或主语从句作主语时，通常把它们放在谓语动词前，而用it作形式主语，放到句首，常见句型有：

1. It + be + 形容词+主语从句，如：

It is uncertain whether he can come to Jenny’s birthday party or not.

2. It + be + 名词词组 + 主语从句，这类名词有：a fact, a pity, a shame, an honour，

a question等，如：

It’s a pity that you missed the exciting football match.

It remains a question whether he will come or not.

3. It + be + 过去分词 + 主语从句，这类过去分词有：announced, believed, expected, hoped, decided, reported, said, shown等，如：

It is reported that 16 people were killed in the earthquake.

It is not decided who will give the operation to the patient.

4. It + 不及物动词(seem, appear, happen等) + 主语从句, 这类不及物动词有：appear, happen, seem等，如：

It seemed that he didn’t tell the truth.

It 做形式主语和形式宾语的句型

常见的It句型（包括it做形式主语和形式宾语）

1.It is/was + 被强调部分+ that/who ... 该句型是强调句型。被强调部分可以是主语，宾语，表语或状语。强调的主语如果是人，that 可以由who 换用。如果把这种句型结构划掉后，应该是一个完整无缺的句子。这也是判断强调句型与其它从句的方法。

一般陈述句：Tom bought a book in this bookshop yesterday.

It is Tom who/that bought a book in this bookshop yesterday. 强调主语

It is a book that Tom bought in this bookshop yesterday. 强调宾语

It is in this bookshop that Tom bought a book yesterday. 强调地点状语

It is yesterday that Tom bought a book in this bookshop. 强调时间状语

2. It is not until + 被强调部分+ that ... 该句型也是强调句型。主要用于强凋时间状语，译成汉语“直到……才……”，可以说是not ... until ... 的强调形式。

It was not until she took off her dark glasses that I realized she was a famous film star. 强调句= Not until she took off her dark glasses did I realize she was a famous film star. 倒装句

it 做形式主语引导的主语从句和作强调句型的区别

但若被强调部分是状语时，则只能用that ，即使指时间、地点、原因等，也不能用when ，where 或because 等替代。

如：It was my sister whom I met in the street yesterday.

It was only when I reread his poems recently that I began to appreciate their beauty.

It was for this reason that her uncle moved out of New York and settled down in a small village.

4 . 注意该句型一般不强调谓语动词强调句型通常强调主语、宾语和状语，一般不强调谓语。需强调谓语时，要在谓语动词原形前面加上助动词do ，does 或did ，尤其是在祈使句或肯定句中，用来加强语气。

如：Do tell me where on earth you are now! Boys and girls , let me tell you something that does sound strange.

To my surprise, he did come here on time last night.

5 . 注意区分含有Not until 的倒装结构和强调结构Not until 用于句首时，主语和谓语通常用倒装语序。如果是复合句，那么主句用倒装语序。但在“ It is / was not until …. that ”句型中，that 后的主谓不倒装。

it做形式主语的主语从句

It is wonderful to learn English in Web.
It is said that learning English in web is wonderful.
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结束语
若有不当之处，请指正，谢谢！
• 大家都在期望他们在一起
(That they are together) is expected by everyone.
It is expected by everyone that they are together.
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To sum up…
1. It is + 名词 + 从句 e.g. It is a fact that Leen is very popular.
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It is + 形容词 + 从句
可以放在主语从句中的形容词有： necessary 必要的
obvious 显然的
wonderful 棒极了的
unusual 不寻常的
surprising 出人意料的
Baidu Nhomakorabea
certain 确定的
worthwhile 值得的
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It is + 形容词 + 从句 ( practice)

“it”引导主语从句和“it”做形式主语还有强调句型的区别分别是什么？

“it”引导主语从句和“it”做形式主语还有强调句型的区别：it引导的主语从句，形式主语就是it，真正的主语在句子的后面，通常是to do的不定式短语。

而强调句的结构

it is/was+被强调部分+that/who+句子其余部分，结构词it is/was和that/ who都是没有实际意思的，只是构成句子结构的词而已。这个强调句只能强调名词和代词，也就是主语和宾语，不能强调其他句子成分。

主语从句：It is kind of you to help me with my housework.

强调句：It is you who help me with my housework.

主语从句中it做形式主语的常见句型：It+be+形容词+主语从句，如：It is u ncertain whether he can come to Jenny’s birthday party or not. It + be + 名词词组+ 主语从句，这类名词有：a fact, a pity, a shame, an honour，a question等，如：

It’s a pity that you missed the exciting football match.

It remains a question whether he will come or not.

It + be + 过去分词+ 主语从句，这类过去分词有：announced, believed, expected, hoped, decided, reported, said, shown等，如：It is reporte that 16 people were killed in the earthquake.

it作形式主语造句

1. It + be + 形容词+主语从句，如：It is uncertain whether he can come to Jenny’s birthday party or not.

2. It + be + 名词词组 + 主语从句，这类名词有：a fact, a pity,

a shame, an honour，a question等，如：It’s a pity that you missed the exciting football match.It remains a question whether he will come or not.

3. It + be + 过去分词 + 主语从句，这类过去分词有：announced, believed, expected, hoped, decided, reported, said, shown等，如：It is reported that 16 people were killed in the earthquake.It is not decided who will give the operation to the patient.

4. It + 不及物动词(seem, appear, happen等) + 主语从句, 这类不及物动词有：appear, happen, seem等，如：It seemed that he didn’t tell the truth.It happened that I was out when he called.

哪些从句作主语时可用it作形式主语

原则上说，it用作形式主语可以代替下列从句：

1. that从句

It is quite clear that he has read the book. 很显然，他读过这本书。(HM)

2. what从句

It doesn’t matter what he says. 他说什么没关系。(HM)

It was clear enough what he meant. 他的意思是很明显的。

3. who从句

It hasn’t been decided who will be sent to work there. 还没决定将派谁到那里工作。

4. how从句

It struck her how gentle he was being. 她深深感到他多么温存。

5. when从句

It hasn’t been made clear when the conference is to take place. 会议什么时候召开还没有宣布。

6. where从句

It’s not known where she we nt. 她到哪里去了没人知道。

It did not matter much where he lived. 他在哪里住都没有关系。

7. why从句

It was clear why he had asked for a conference. 他为什么要求召开会议原因很清楚。

8. whether从句

It makes little difference whether we go or stay. 我们去还是留没有多大差别。

it做形式主语的19个句型

1.It is/was + 被强调部分+ that/who ...

该句型是强调句型。被强调部分可以是主语，宾语，表语或状语。强调的主语如果是人，that 可以由who 换用。如果把这种句型结构划掉后，应该是一个完整无缺的句子。这也是判断强调句型与其它从句的方法。

2. It is not until + 被强调部分+ that ...

该句型也是强调句型。主要用于强凋时间状语，译成汉语“直到……才……”，可以说是not ... until ... 的强调形式。

It was not until she took off her dark glasses that I realized she was a famous film star.

= Not until she took off her dark glasses did I realize she was a famous film star.

= I didn't realize she was a famous film star until she took off her dark glasses.

3. It is clear /obvious/true/possible/certain… that …

该句型中it 是形式主语，真正的主语是that 引导的主语从句，常译为“ 清楚（显然，真的，肯定……）”是主语从句最常见的一种结构。

It is very clear that he's round and tall like a tree.

英语语法：形式主语it构成的主语从句

【导语】有时为了考虑句⼦平衡，通常在主语从句处使⽤形式主语it，⽽将真正的主语从句移⾄句末。整理了相关内容，快来看看吧！希望能帮助到你~更多相关讯息请关注！

(1) 对于以连词that引导的主语从句，通常⽤形式主语代主语从句：

It is important that he should know about this. 他必须知道此事。

It’s vital that we be present. 我们出席是⾄关重要的。

It was intended that you be the candidate. ⼤家的意图是让你当候选⼈。

It is important that this mission not fail. 这项使命不失败⾄关重要。

It is essential that a meeting be convened this week. 本周开⼀次会⾮常重要。

It is appropriate that this tax be abolished. 废除这个税是恰当的。

It’s unfair that so many people should lose their jobs. 竟有这么多⼈失业这是不公平的。

It’s amazing that she should have said nothing about it. 她竟未谈及此事令⼈惊讶。

It’s unthinkable that they should deny my request. 他们竟然拒绝我的请求，这是不可思议的。

it做形式主语的用法大全

It作形式主语常见句型

四川省乐至中学张与刚

动词不定式，动名词或主语从句作主语时，通常把它们放在谓语动词前，而用it作形式主语，放到句首，常见句型有：

1。It + be + 形容词+主语从句，如:

It is uncertain whether he can come to Jenny's birthday party or not.

2. It + be + 名词词组+ 主语从句，这类名词有：a fact，a pity, a shame, an honour，

a question等,如：

It’s a pity that you missed the exciting football match。

It remains a question whether he will come or not.

3。It + be + 过去分词+ 主语从句，这类过去分词有：announced, believed，expected, hoped, decided, reported, said，shown等, 如：

It is reported that 16 people were killed in the earthquake。

It is not decided who will give the operation to the patient.

4. It + 不及物动词（seem, appear，happen等）+ 主语从句, 这类不及物动词有：appear，happen，seem等，如：

It seemed that he didn’t tell the truth。

It做形式主语句型整理大全

It作形式主语常见句型

动词不定式，动名词或主语从句作主语时，通常把它们放在谓语动词前，而用it作形式主语，放到句首，常见句型有：

1. It + be + 形容词+主语从句，如：

It is uncertain whether he can come to Jenny’s birthday party or not.

2. It + be + 名词词组+ 主语从句，这类名词有：a fact, a pity, a shame, an honour，a question等，如：

It’s a pity that you missed the exciting football match.

It remains a question whether he will come or not.

3. It + be + 过去分词+ 主语从句，这类过去分词有：announced, believed, expected, hoped, decided, reported, said, shown等，如：

It is reported that 16 people were killed in the earthquake.

It is not decided who will give the operation to the patient.

4. It + 不及物动词(seem, appear, happen等) + 主语从句, 这类不及物动词有：appear, happen, seem等，如：

It seemed that he didn’t tell the truth.

it形式主语句型

“it”在英语中经常用作形式主语，尤其是在主语从句中。形式主语用于表示主语从句，即一个句子作为主语，而“it”是这个句子的形式主语。以下是几个使用“it”作为形式主语的常见句型：

1. It is + 形容词+ that + 主语从句

例如：It is clear that he has made a mistake.

解释：在这个句型中，“it”是形式主语，“that”后的句子是真正的主语。

2. It is + 名词+ that + 主语从句

例如：It is a fact that the earth is round.

解释：这个句型与上一个相似，但形容词被替换为名词。

3. It + 动词+ 主语从句

例如：It happened that he was late for the meeting.

解释：在这个句型中，“it”是形式主语，动词是主语从句的谓语。

4. It + be + 时间/距离+ before + 主语从句

例如：It will be two years before we meet again.

解释：这个句型用于表示在某个时间或距离之后会发生某事。

5. It is/was + 被强调部分+ that + 主语从句

例如：It was yesterday that he met his friend.

解释：这个句型用于强调某个时间或部分。

这些只是使用“it”作为形式主语的一些常见句型。在英语中，还有其他更复杂或特定的用法。

It作形式主语常见用法

It作形式主语常见句型

1。It + be +形容词+ that-从句

可用于此句型的形容词有：wonderful, true，good,right，wrong,（un)important，useless，surprising,disturbing，frightening,alarming,clear，unusual，lucky，certain, necessary等。如:

①It is quite certain that he will be at the meeting。他将出席会议是无疑的.

②It is surprising that he came late to school this morning.他今天早上迟到真令人惊讶。

③It is important that we （should）study hard.我们努力学习是很重要的。

注意：该句型中的形容词是（un）important，necessary等时,从句应为（should ）+动词原形.

It is important that we （should) learn English well。

It is necessary that he (should）remember these words.

2。It + be +名词+ that-从句

适用该句型的名词（词组）有: a pity，an honor,a good thing,a fact，a surprise，a question,

a shame，a custom，a truth,our hope，no wonder, good/bad manners等。如：

It作形式主语和宾语常见句型

________was difficult to go from ‘we’ to‘me’，
said Joe Kita to us.
(2013·淄博模拟)
A．I B．that C．it
D．which
晨读吧
基础盘点ABC
要点精析ABC
3．The doctor says________may be necessary for
me to have an operation. A．it B．that C．which D．what
晨读吧
基础盘点ABC
要点精析ABC
• 对点训练：
• 1. It is generally considered unwise to give a
child
—he or she wants. (NMET 1997)
adj. to sb＋that从句”结构。故选C。 • 21. A2[2014·陕西卷] I'd appreciate ________ if
you could let me know in advance whether or not you will come.
• A. it B. you C. one D. this
• 9. ___W__h_a_t _is__sa_i_d____________(say) is that there is another football match on the air this evening.

it作形式主语的四种基本句型

1. It + is/was + 形容词 + (for someone) + to do something.

例如： It is difficult for me to understand this concept.

It was easy for them to solve the problem.

2. It + is/was + 名词 + (for someone) + to do something.

例如： It is important for students to attend classes regularly. It was a great opportunity for him to showcase his talent.

3. It + is/was + 动词不定式 + (for someone) + to do something.例如： It is necessary for us to study hard for the exam.

It was a pleasure for her to meet her favorite singer.

4. It + is/was + 形容词 + that + 主语 + (should) + 动词.

例如： It is essential that we should protect the environment. It was important that she arrived on time for the meeting.