it 作形式主语的固定句型

您好，很高兴为您解答

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 happened that I was out when he called

5 It + be + 形容词+ for sb）+ 动词不定式  这类句型常用形容词easy, difficult, hard, important, possible，wise等作表语，有时候为了强调不定式动作的执行者，常在不定式前加for sb，如：

It’s necessary for the young to master two foreign language

It is unwise to give the children whatever they want

这类形容词有：easy, difficult, hard, important, possible，wise

6 It + be + 形容词 + of sb + 动词不定式，这类形容词常是表示心理品质,性格特征的形容词，如：kind, nice stupid, clever, foolish, polite, impolite, silly, selfish, considerate等。

某人和这些形容词可以构成主系表结构。如：

It’s very kind of you to help me with the work =You are kind to help me

It seemed selfish of him not to share his dictionary with others

=He seemed selfish not to share his dictionary with others

7 It + be +名词词组 + 动词不定式，如：

It is not a good habit to stay up too late

8 It + be + 名词或形容词+ 动名词，这类名词和形容词常常是：

good, no good, no use, a waste of, useless, senseless等，如：

It’s a waste of time talking to her any more

It is no use arguing about the matter with him

9 It + take ( sb )+ 时间（金钱）+ 动词不定式，如：

It took the workers almost three years to finish building the dam

It will take a whole day to get to the top of the mountain on foot

希望能帮助到您，谢谢。望采纳。

1it做形式主语

It is +adj+(for sb) +to do sth

It is time to do/for/that

2it做形式宾语

主语+found/think+it +宾补（动词不定式、形容词等）

初中常见的就这几个了,如果有不明白的,欢迎追问、

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 happened that I was out when he called

5 It + be + 形容词 + for sb）+ 动词不定式

这类句型常用形容词easy, difficult, hard, important, possible，wise等作表语，有时候为了强调不定式动作的执行者，常在不定式前加for sb，如：

It’s necessary for the young to master two foreign language

It is unwise to give the children whatever they want

这类形容词有：easy, difficult, hard, important, possible，wise

6 It + be + 形容词 + of sb + 动词不定式，这类形容词常是表示心理品质,性格特征的形容词，如：kind, nice stupid, clever, foolish, polite, impolite, silly, selfish, considerate等。某人和这些形容词可以构成主系表结构。如：

It’s very kind of you to help me with the work=You are kind to help me

It seemed selfish of him not to share his dictionary with others=He seemed selfish not to share his dictionary with others

7 It + be +名词词组 + 动词不定式，如：

It is not a good habit to stay up too late

8 It + be + 名词或形容词 + 动名词，这类名词和形容词常常是：good, no good, no use, a waste of, useless, senseless等，

如：

It’s a waste of time talking to her any more

It is no use arguing about the matter with him

9 It + take ( sb )+ 时间（金钱）+ 动词不定式，如：

It took the workers almost three years to finish building the dam

It will take a whole day to get to the top of the mountain on foot

1It 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

= I didn't realize she was a famous film star until she took off her dark glasses  一般句式

3 It is+形容词（clear /obvious/true/possible/certain…）+ that 从句  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

= That he's round and tall like a tree is very clear

4  It is+形容词（important /necessary/ right/strange/natural）+that 从句(should) do  该句型和上一个同属一个句型。由于主句中的形容词不同，that 后的从句中要用虚拟语气（should + 动词原形），should 可以省去。

It is necessary that we (should)learn a foreign language

it 作形式主语主语从句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。这分四种情况：(1) 对于以连词that引导的主语从句，通常用形式主语it替代主语从句：(2) 对于以连接代词(副词)引导的主语从句，可以使用形式主语代主语从句，也可直接在句首使用主语从句：(3) 对关系代词型what引导的主语从句，通常直接将主语从句放在句首。如：(4) 如果句子是疑问句，则必须用带形式主语it的结构：

1-1○连词that引导的主语从句，通常用形式主语it替代主语从句It is +名词+从句

It is a fact that… 事实是……；It is good news that … 是好消息；It is a question that … 是个问题；It is common knowledge that … 是常识类似的名词还有：a pity；a wonder；a good thing； no wonder； surprise等it is no surprise 毫不惊奇地例如

It is a mystery to me how it all happened

这是怎么发生的，对我来说就是一个谜。It is common knowledge that the whale is not a fish鲸鱼不是鱼，这是一个常识。It is no surprise that China is making progress on such fronts: the manufacture of large passenger aircraft and high-speed trains, research in yeast and aerospace

中国在很多尖端领域，如大飞机制造，高铁、干细胞、

航天航空研究等领域取得飞速发展一点都不惊讶。

It is +形容词+从句

以上就是关于主语从句中it做形式主语的常见句型全部的内容，包括:主语从句中it做形式主语的常见句型、it 作形式主语和形式宾语的句型及其句型,解释得好还可以增加赏金.、it 作形式主语的固定句型等相关内容解答，如果想了解更多相关内容，可以关注我们，你们的支持是我们更新的动力！