It做形式主语句型整理大全
浅谈it作形式主语的用法
浅谈it作形式主语的用法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 honor,a question等，如：It is 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（修饰事情）+ for sb. + to do这类句型常用形容词easy, difficult, hard, important, possible, wise等，It is necessary for the young to master two foreign language.It is unwise to give the children whatever they want.6. It + be + 形容词（形容人的心理品质,性格特征）+ of sb. + to do，这类句型常用形容词kind, nice stupid, clever, foolish, polite, impolite, silly, selfish等。
高中英语it作形式主语的句型
it作形式主语的句型It is no use doing sth. 做……没用It is not any use doing sth. 做……没用It is no good doing sth. 做……没好处It is not any good doing sth. 做……没好处It is no need doing sth. 做……没必要It is fun doing sth. 做……有趣It is a good thing that---……是件好事It is good news that---……是好消息It is obvious that---……很明显It is necessary that--- 有必要……It is important that--- 重要的是……It is strange that--- 奇怪的是……It is likely/possible that--- 可能是……It is well-known that--- 众所周知……It is said that--- 据说……It is reported that--- 据报道……It is recorded that--- 据记载……It is suggested that--- 有人提议……It has been proved that--- 业已证明……It seems/appears that--- 好像……It happened that--- 碰巧……It turns out that--- 结果是……It occurs to sb. that--- 某人想到……It is important/necessary/impossible for sb. to do--- 对某人来说做……很重要/是必要的/不可能的。
It is foolish/kind/nice of sb. to do---某人做……是愚蠢的/好心的/友好的。
It作形式主语和形式宾语用法详解
新希望英语语法精讲—“It”作形式主语和形式宾语“It”作形式主语和形式宾语的用法详解It作形式主语和形式宾语用法，是英语学习的主要语法项目之一。
无论是单项选择，还是完行填空，it 用法始终是反复考查的重、热点之一。
现将it在特殊句型中作形式主语和形式宾语用法，进行如下归纳分析，以供学习参考。
一、It用作形式主语当不定式（短语）、动名词（短语）或从句在某个句子中作主语时，为保持句子结构前后平衡，避免头重脚轻，因此常用it作形式主语置于句首，而将真正的主语放在句尾。
此时it只起先行引导作用，本身无词义。
e.g. It is wrong to tell a lie.（说谎是错误的。
）［It 为to tell a lie 的形式主语〕It is no use arguing about it.（争吵是没用的。
）〔It 为arguing about it 的形式主语〕It is uncertain who will come.（谁要来还不确定。
）〔It 为who will come 的形式主语〕It作形式主语的常见句型：① It + be + 形容词+ to do sth. / doing /that ….e.g. It is very important to learn a foreign language. （学一门外语非常重要。
）It is useless crying over the spilt milk. （覆水难收。
）It was really surprising that she married a man like that.（她嫁给那样的男士真让人惊讶。
）②It + be +名词词组+ doing / that….e.g. It is no good telling lies. （撒谎没好处。
）It is a pity that you didn’t go to see the film yesterday. （你昨天没看成那部电影真遗憾。
it用法大全形式宾语形式主语
2.非人称代词it
it有时并不指详细旳东西，而泛指天气、时间、环境等， 称为非人称旳it： 2.1.指天气： It is a lovely day, isn’t it? It is a bit windy.
2.2.指时间: It was nearly midnight when she came back.
用It作形式主语旳句型： (1) It is adj.＋ to do sth. It is difficult to translate this article.翻译这篇文章 极难。
(2) It is adj. ＋ for/of sb.＋ to do sth. It is important for us to learn English.学习英语对我 们很主要。
㈠ 1.it作人称代词
1.1.it旳最基本使用方法是作人称代词，主要指刚 提到 旳事物，以防止反复:
Ningbo is a beautiful city, isn’t it?
1.2.也能够指动物或婴儿(未知性别旳婴儿或孩子): Is this your dog？No, it isn’t.
1.3.也可指抽象事物: It was a great surprise to me when he did a thing like that．
2）.It is +v-ed +that 从句 ① It is said (reported， learned....) that ...
据说（据报道，据悉．．．）“。 It is said that he has come to Beijing.
= He is said to have come to Beijing.
②不论被强调部分是哪种状语，只能用 that连接，不得使用where、when等连词.
It作形式主语的几大基本句型
“It”作形式主语的几大基本句型2011—06-07 22:27:53| 分类: 语法归纳｜标签: ｜字号大中小订阅◇It’s +形容词/名词+that +从句It is necessary that you train yourself before the walk.It is important that you have your own support team.It was a pity that he lost the game。
It’s a pity that you missed the exciting football match。
◇It’s +形容词+(for sb）+to do sthIt is difficult to walk through eight country parks.It is useful to have support teams.It is important for him to finish it in ten hours.It is necessary for people to learn team spirit。
特别提醒：☆该句型的否定结构为It’s +形容词+(for sb）+not +to do sthIt is very important not to give them too much food。
(7B 100）It is very polite not to speak loudly in public.☆该句型有时可以与It is + adj. + that从句的句型互换使用，意思不变。
如: It is necessary for you to train yourself before the walk。
= It is necessary that you will train yourself before the walk.◇It’s +名词+to do sthIt’s everyone’s duty to obey the law.It is not a good habit to stay up too late。
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= 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作形式主语和宾语的几种结构
“It”作形式主语和宾语It作形式主语和形式宾语用法，是中学阶段英语学习的主要语法项目之一。
纵观历届高考题，无论是单项选择，还是完形填空，it用法始终是反复考查的重、热点之一。
现将it在特殊句型中作形式主语和形式宾语用法，进行如下归纳分析。
一、It 用作形式主语当不定式（短语）、动名词（短语）或从句在某个句子中作主语时，为保持句子结构前后平衡，避免头重脚轻，因此常用it作形式主语置于句首，而将真正的主语放在句尾。
此时it只起先行引导作用，本身无词义。
e.g. It is wrong to tell a lie.(说谎是错误的。
) 〔It为to tell a lie的形式主语〕It is no use arguing about it.(争吵是没用的。
) 〔It为arguing about it的形式主语〕It is uncertain who will come.(谁要来还不确定。
) 〔It为who will come的形式主语〕It 作形式主语的常见句型：① It + be + 形容词+ to do sth. / doing / that ….e.g. It is very important to learn a foreign language.(学一门外语非常重要。
)It is useless crying over the spilt milk.(覆水难收。
)It was really surprising that she married a man like that.(她嫁给那样的男士真让人惊讶。
)② It + be +名词词组+ doing / that ….e.g. It is no good telling lies.(撒谎没好处。
)It is a pity that you didn’t go to see the film yesterday.(你昨天没看成那部电影真遗憾。
it作形式主语
it作形式主语 It作形式主语常见句型 1. It is kind ( of sb. ) to do sth. 常见替代kind的形容词有bad, brave, careless, clever, cruel, foolish, good (好心的), honest, horrible, kind, lazy, modest, naughty, nice (有教养的), polite, rude, silly, stupid, wise, wrong (错误的)等。这个句型可以改写为：sb. is kind to do sth. It is kind of you to say so. = You are kind to say so. 2. It is necessary ( for sb. ) to do sth. 该句型与上一个同属一个句型。如果不定式的逻辑主语是由for 引起，主句中的形容词通常是表示重要性，紧迫性，频繁程度，难易，安全等情况的形容词。常见的形容词有： ①important, necessary, natural ②easy, safe, common, normal, hard, difficult, dangerous, unusual, rare, impossible, pleasant 等。 在①中的形容词作表语可以用从句改写： It is important for her to come to the party. = It is important that she (should ) come to the party 3. It is clear /obvious/tr ue/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. = That he's round and tall like a tree is very clear. 4. It is important /necessary/ right/strange/natural... that ...+(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。 5. It is said (reported, learned/believed/estimated/announced…) that … It is said that Mary is leaving for London tomorrow. =Mary is said to leave for London tomorrow. It is believed that printing was first invented by the Chinese. 一般相信印刷术最早是由中国人发明的. It is reported that a traffic accident took place early this morning. It is estimated that ten people were killed in the accident. 据估计这场车祸有10个人丧生. 6. It is suggested (recommended /ordered/ required ... ) that ... +(should) do It is recommended that the project should not be started until all the preparations have been made. 7. It is a pity ( a shame /no wonder /an honor... ) that ... 该句型中，that 后的从句一般用虚拟语气（should + 动词原形），should 可省去．表示出乎意料，常译为“竟然”。没有这种意义时，则不用虚拟语气。 It is a pity that such a thing ( should ) happen in your class. 这种事竟然发生在你们班上，真是遗憾！ It is a pity that he is ill. 他生病了，真遗憾！ 8. It is time ( about time , high time ) that ...该句型中that 后的从句应该用虚拟语气，值得注意的是①常用过去时态表示虚拟．②有时也用should + 动词原形，should 不能省。常译为“是（正是）……的时侯……”。 It is (high/about) time that you went to school. 9. It /This is the first ( second… ) time that …(从句中使用完成时态) It is the first time I have been here. = This is the first time I have been here. 10. It happens (seems, appears ) that... 该句型中it是形式主语，that 引导的是主语从句，主句中的happen, seem 等词是不及物动词． It happened that he met his teacher in the street. 碰巧…… It seems that he will be back in a few days. 看来…… 11. It takes sb.… to do sth. 该句型中的不定式是真正的主语，it是形式主语，句型中的直接宾语是时间。常译为“做……要花费某人……”。 It took them a year to build the bridge. It takes much patience to learn English well. It takes o lot of courage to do a thing like that. 12. It is no good (use ) doing sth. 该句型中的真正主语是动名词短语，主句中的表语可以是no good , ( not any good ) , no use , ( not any use ),a waste of time 等。 13. It doesn't matter whether .../It makes no difference whether... 该句型中whether 引导的从句是真正主语，该句型常译为“不论（是否）…… 没关系……。 It doesn’t matter whether he comes or not. 14. It looks ( seems ) as if /as though... It looks as if they are all in a terrible hurry. 15 It occurs to me/ it hits me/it strikes me that …我突然想起…习题： 高考链接： 1 In fact______is a hard job for the police to keep order in an important football match. A this B that C there D it 2________is a fact that English is being accepted as an international language. A There B This C That D It 3 Is_______necessary to take off our shoes when we enter the lab？ A everyone B this C her D it 4_________will take you a lot of time to find him in the crowd. A It B I C We D They 5__________is reported in the newspaper, Shen Zhou VI launched successfully. A As B What C It D That 6 ________certain that his invention will make people’s life convenient. A That’s B This is C It’s D What 对比练习： 7（1）________is a fact that English is being accepted as an international language. (2)________is no need for us to discuss the problem again since it has already been settled. (3)________is unnecessary for you to explain it to us any more . (4)________is at least tens years since I left school. 8(1)_______is well known that Antarctica is difficult to reach. (2)_______is well known, Antarctica is difficult to reach. (3)________is well known is that Antarctica is difficult to reach. 9(1)________is no doubt that he’ll come . (2)_______is no use arguing with such a man . (3)______is going to be an English composition contest this afternoon. 翻译句子： 10 大家普遍认为，你有前途。（promising） 11 要求你们考试不许作弊。 12和你共度周末真是件令人高兴的事。 13 掌握一门外语很重要。 14 他们输了比赛，一点都奇怪。
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It作形式主语罕见句型之樊仲川亿创作动词不定式，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，罕见句型有：
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
这类句型经常使用形容词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，这类形容词常是暗示心理品质,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，这类名词和形容词经
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.。