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.
=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…) that …
该句型中的it 仍是形式主语，真正主语是that 引导的主语从句。该结构常译为“据说（据报道，据悉……）”。
6. It is suggested ( ordered, required ... ) that ... +(should) do
该句型和上一个同属一个句型。主句中的过去分词是表示请求，建议，命令等词时，that 后的从句要用虚拟语气（should +动词原形），should 可以省。常译为“据建议；有命令……）”。
7. It is a pity ( a shame ... ) 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……”。
9. It is the first ( second … ) time that …
该句型要和上一个句型区别开来。该句型中的that 从句不用虚拟语气，而用完成时态。至于用什么完成时态，由主句的谓语动词的时态决定。如果是一般现在时，后面从句用现在完成时态；如果是一般过去时，后面从句则用过去完成时态。该结构中that 可以省去；it 有时用this 替换，常译为“是第一（二）……次……”。
It is the first time I have been here.
= This is the first time I have been here.
10. It is … since ...
该句型主要用作处理瞬间动词的完成时，又要和表示一段时间的时间状语连用的问题。主句中是时间作表语，其时态是现在时或完成时，since 引导的从句通常是一般过去时态，而且是瞬间动词。如果主句是一般过去时，从句则用过去完成时。
11. It is ... when ...
该句型中的when 引导的是一个时间状语从句，主句中的it 指时间，表语由具体的时间充当。常译为“当……的时候，是……”。
12. It be ... before ...
该句型主句中的it 指时间, 主句中的时态常是将来一般时或过去时两种时态．主句中的表语多
是long, not long , 3 days , 2 weeks 等表示时间段的词或短语。常译为“……之后……”。
13. It happens (seems, looks, 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 ( so happened ) that he met his teacher in the street. 碰巧……
It seems that he will be back in a few days. 看来……
14. 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……”。
15. 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 )。
16. It doesn't matter whether ( if ) ...
该句型中whether (if) 引导的从句是真正主语，该句型常译为“不论（是否）……没关系……。
17. It is kind ( of sb. ) to do sth.
该句型中的不定式短语是真正主语，如果不定式的逻辑主语是由of 引起，主句中的形容词必须是能表示逻辑主语特征的形容词。常见的有: 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.
18. 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，如：
It is important for her to come to the party.
= It is important that she (should ) come to the party
19. It looks ( seems ) as if ...
该句型中it 无意义。as if 引导一个状语从句。常译为，“看起来好象……＂如果与事实不相符合，则用虚拟语气．
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) rember 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： ①It is a pity (that) you missed the sports meeting last week.你错过了上周的运动会太可惜了。 ②It is a fact that Engl ish is being accepted as an international language.事实上英语已经被作为一种国际语言而接受了。
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 sth It 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 sth It 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 sth It’s everyone’s duty to obey the law. It is not a good habit to stay up too late. As a student, it is bad manners to come late to class. It is my turn to clean the blackboard.
常用it作形式主语的句型结构
常用 it 作形式主语的句型结构 ?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， clear, unusual, lucky, certain, necessary等。女口： ①It isquite certain that hewill be at the meeting. ②It is surprising that he came late to school this morning. ③It isimportant that we(should) study hard 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 + be + -ed 分词 + that-从句 适用该句型的过去分词主要有：said,reported, announced,hoped,thought, told, believed, expected, decided, suggested,known 等。如： ①It ishoped thatonedaytheywill haveenoughanimalsto setthem free ②It is well known that the earth goes around the sun. ③It is suggested that the sports meeting (should ) be put off until next week. 注意：该句型的过去分词是suggested时，从句应为(should )+动词原形。 ?It + be + 名词 + that-从句 适用该句型的名词 (词组) 有：apity, anhonor, agood thing, afact, asurprise, goodnews, one's duty 等。如： ① It isapity (that)you missedthesportsmeetinglastweek. ② It isafactthatEnglish isbeingacceptedasaninternational language. ?It ＋seem／ appear／ happen 的适当形式＋ that 从句。该句型常可以转换成含不定式的简单句。如： ①It seemsthat thereisabig wastepipecomingdown from the town. T There seemsto be a big waste pipe coming down from the town. ②He appearedto becalm,but insidehisheartwasbeatingwildly with fear. t It appearedthathewascalm,butinsidehisheartwasbeatingwildly with fear. ?It does n't matter ( It 'no won der; It does n 'make much differe nee 等) ＋ when/ where/ which/ whether 等从句。如： ①Does it matterif hecan'tfinish thejob ontime? ②Theyareallclassmates. It isnowonder they should help eachother with their studies. ?It + be+ adj./ n. (for sb./ ofsb.)+ todosth. 该句型中的形容词通常是表示事物的特点或特征的如 difficult , hard, easy, impossible, necessary, important 等,此时用 fo r ；或表示人的性格特征或特点的如nice, good, bad, kind, silly, foolish, wise, clever, careless, rude, brave, cruel, careful, grateful等，这时要用 of。如： ① It is foolish of you to give up such a good chance. ② It is necessary for college students to master at least a foreign language 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：
it做形式主语用法大全含练习与答案
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 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.
It做形式主语句型整理大全资料
I t做形式主语句型整 理大全
精品文档 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 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. 收集于网络，如有侵权请联系管理员删除
It 作形式主语的三种句型
It 作形式主语的三种句型 【热身训练】 Ⅰ. 单项选择 ( ) 1. — Is it to talk with her? — Yes. She is not always friendly to others. A. kind B. easily C. meaningful D. tough ( ) 2. It is meaningful us action to protect our Earth. A. of; to take B. for; to take C. of; taking D. for; taking Ⅱ. 按要求完成下列各题。(第3~4题翻译句子；第5题改写同义句) 3. 加入他们做一些志愿者工作很有趣。 4. 对孩子们来说，在马路上踢足球是危险的。 5. It is important that we should understand our parents. is important us our parents. 【融会贯通】 It is + adj. + that从句 用法简介 该句型中that从句在句中作主语，it作形式主语。这个句型常用来说明对某事的感受。句型意为“某人做某事是……”。 典型例句 It’s necessary that you wash your hands before meals. 你饭前洗手是必要的。 It’s + adj. + (not) to do sth. 用法简介 这是动词不定式短语作主语的最常用句型。动词不定式短语作主语时，常用it 作形式主语，而将真正的主语(动词不定式短语)后置，以保持句子的平衡。句型意为“(不)做某事是……”。 典型例句 It’s important to learn a foreign language. 学一门外语是重要的。 It is very polite not to speak loudly in public. 在公共场合不大声说话是非常礼貌的。 It is + adj. + for / of sb. (not) to do sth. 用法简介 这是I t’s + adj. + (not) to do sth.的延伸句型。当动词不定式短语作主语，且其含有自己的逻辑主语时，在动词不定式短语之前用介词for或of引出其逻辑主语。 典型例句 It is very easy for me to finish the work. 完成这项工作对我来说是很容易的。 It’s very kind of you to help me. 你能帮我，真好。
“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： ①It + 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 is a truth that there would be no new China without the Communist Party. (没有共产党就没有新中国，这是毋庸质疑的。) ③It + be + 过去分词+ that …. 该句型常见动词有：say, hope, think, suppose, expect, report, know, believe, decide, etc. e.g. It is said that they have invented a new type of computer. (据说他们发明了一种新型电脑。) It is believed that China will become one of the strongest countries in the world. (大家都相信中国将会步入世界强国之列。) It was reported that more than 170 thousand people died in the 2004 tsunami. (据报道，至少有十七万人在2004年那场海啸中丧生。) ④It + seems / appears / happens等不及物动词+ that …. e.g. It seems that he enjoys pop songs very much.(似乎他非常喜欢流行歌曲。) It appears that Tom might change his mind. (看来汤姆可能会改变主意。) ⑤若句子是疑问形式，就只能用it作形式主语。 e.g. Does it matter much that they won’t come tomorrow? (他们明天不来很重要吗？) Is it true that he will go abroad next week? (他下周出国是真的吗？) ⑥It + takes + (sb.) + some time + to do sth. 这是一个表示“（某人）花多少时间干某事”的句型，其中it是形式主语，代替后面的不定式（to do sth.），句型中的sb.也可以省略。 e.g. It took me some time to read the reading materials.(我花了一些时间才读完那段阅读材料。)It took him fourteen hours to go to New Zealand from Shanghai by plane.(从上海乘飞机去新西兰花了他14小时。) How long does it take you to go to Beijing from Qingdao by train? (从青岛坐火车到北京一般要花多久时间？) I am not sure, but I think it takes at least nine hours to get there. (我不能肯定，但估计至少要九个钟头才能到那儿。) 二、It 用作形式宾语 当不定式（短语）、动名词（短语）或从句在某个句子中作宾语时，为保持句子结构平衡，避免句式结构的混乱，常用it作形式宾语，而将真正的宾语放在句尾。此时it仍只起先行引导作用，本身无词义。下列四种情况须用it 作形式宾语：
it做形式主语做常用的句型练习2培训资料
i t做形式主语做常用 的句型练习2
For many students, it is easy to get to school. 对许多学生而言, 到校很容易。 【思一思句型剖析】 (1)“It is +adj. +动词不定式短语”句型中, it在句中作形式主语, 而真实主语是后面的动词不定式短语。有时动词不定式有自己的逻辑主语, 常由“for sb 或of sb. ”构成。 (2)it作形式主语时常用两种句式结构: e.g It is easy for me to learn math. It is impossible for you to enter a good college. It’s dangerous for you to swim alone in the river. It is very kind of you to help me with physics. It is friendly of you to show me the way to the police station. It is more than nice of you to help the old. 一．Fill in the blanks: 1.It is not easy _________ (for/of)us ________(learn) a foreign language. 2.It’s useful ________(for/of) us to use a map when we go to a new city. 3.Is ______ necessary to complete the design before The National Day? 4.It is _________(possibly) _______(for/of)us to fly to the moon in a spaceship.
it做形式主语的个句型
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. = 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…) that … 该句型中的it 仍是形式主语，真正主语是that 引导的主语从句。该结构常译为“ 据说（据报道，据悉……）”。 6. It is suggested ( ordered, required ... ) that ... +(should) do 该句型和上一个同属一个句型。主句中的过去分词是表示请求，建议，命令等词时，that 后的从句要用虚拟语气（should + 动词原形），should 可以省。常译为“ 据建议；有命令……）”。 7. It is a pity ( a shame ... ) 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……”。 9. It is the first ( second … ) time that … 该句型要和上一个句型区别开来。该句型中的that 从句不用虚拟语气，而用完成时态。至于用什么完成时态，由主句的谓语动词的时态决定。如果是一般现在时，后面从句用现在完成时态；如果是一般过去时，后面从句则用过去完成时态。该结构中that 可以省去；it 有时用this 替换，常译为“是第一（二）……次……”。 It is the first time I have been here. = This is the first time I have been here. 10. It is … since ... 该句型主要用作处理瞬间动词的完成时，又要和表示一段时间的时间状语连用的问题。主句中是时间作表语，其时态是现在时或完成时，since 引导的从句通常是一般过去时态，而且是瞬间动词。如果主句是一般过去时，从句则用过去完成时。 11. It is ... when ... 该句型中的when 引导的是一个时间 状语从句，主句中的it 指时间，表语由具体的时间充当。常译为“当……的时候，是……”。 12. It be ... before ...
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 形式主语，顾名思义，即形式上是主语，但实际上不是真正的主语，真正的主语是后面的动词不定式、动名词或主语从句等。如果让后面的动词不定式、动名词或主语从句用作主语，那么在句式上容易造成“头重脚轻”，句式不平衡，故往往用it作形式主语，而把真正的主语放在后面。it在这里没有任何意义。初中阶段，it作为形式主语常常用在以下几个句型。（为避免混淆，本文暂时省略了另两大句型，日后再论） ◇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 sth It 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 sth It 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 sth It’s everyone’s duty to obey the law. It is not a good habit to stay up too late. As a student, it is bad manners to come late to class. It is my turn to clean the blackboard.
it作形式主语常见句式
it作形式主语常见句式 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 s hame, an honour，a question等，如： It’s a pity th at 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, beli eved, 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，wi se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 da m. It will take a whole day to get to the top of the mountain on foot.
it做形式主语做常用的句型练习
i t做形式主语做常用的 句型练习 文件排版存档编号：[UYTR-OUPT28-KBNTL98-UYNN208]
F o r m a n y s t u d e n t s,i t i s e a s y t o g e t t o s c h o o l. 对许多学生而言, 到校很容易。 【思一思句型剖析】 (1)“It is +adj. +动词不定式短语”句型中, it在句中作形式主语, 而真实主语是后面的动词不定式短语。有时动词不定式有自己的逻辑主语, 常由“for sb 或of sb. ”构成。 (2)it作形式主语时常用两种句式结构:
It is easy for me to learn math. It is impossible for you to enter a good college. It’s dangerous for you to swim alone in the river. It is very kind of you to help me with physics. It is friendly of you to show me the way to the police station. It is more than nice of you to help the old. 一．Fill in the blanks: 1.It is not easy _________ (for/of)us ________(learn) a foreign language. 2.It’s useful ________(for/of) us to use a map when we go to a new city. 3.Is ______ necessary to complete the design before The National Day? 4.It is _________(possibly) _______(for/of)us to fly to the moon in a spaceship. 5.It’s very kind ________(for/of) you _______(help) me with my homework. 6.It is very polite ________(for/of) him not _________(speak) loudly in public. 7.It is bad for your teeth ________(eat) so much chocolate. 8.It is good _______(for/of) your health ______(take) exercise every day. 9.It’s ________(importance) for her to get good grades in every subject. 10.It’s ________(difficulty) for Jane to get along well with others. She has such a bad temper. 二．True or False: 1.This is impossible for us to get across such a narrow bridge.
it作形式主语句式结构
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, sen seless 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. 主语从句： 1.