it做形式主语:英语 it作形式主语 我想要例句！！

英语 it作形式主语 我想要例句！！

it is important to learn english well.把英语学好很重要这里的to learn english well就是主语 it 的内容，it 即为一个形式主语，这是动词不定式做主语，it 也可以指一整句，比如，it is important that we should learn english well. 学好英语对我们来说很重要，这里的we should learn english well就是形式主语 it 的内容。

It作形式主语的常见句型有哪些

【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，这类名词有：这类过去分词有：said,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,happen等) + 主语从句,这类不及物动词有：appear,happen,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,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，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，这类形容词常是表示心理品质,性格特征的形容词，kind,clever,foolish,silly,selfish,某人和这些形容词可以构成主系表结构。这类名词和形容词常常是：good,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做形式主语时在什么情况下接doing?

it用作形式主语代替动名词的用法主要见于以下句式：fun,It’s fun working for him. 为他工作很有意思。It’s great fun sailing a boat. 扬帆驾舟十分有趣。It’s no use shouting at him—he’s deaf. 向他叫喊是没有用的——他耳聋。It has been a great honour your coming to visit us. 你来看望我们是极大荣幸。interesting,pleasant,It is useless speaking. 光说没有用。It was pleasant sitting there. 坐在那里很愉快。It’s so nice sitting here with you. 和你坐在一起真是愉快。It’s good hearing English spoken. 听到人讲英语，我很高兴。It’s terribly tiring working late like this. 这样干到深夜是非常累人的。It’s worth while doing the work. 这项工作值得做。你认为和我吵值得吗?It doesn’t matter wasting a little money. 浪费一点钱没有关系。

It 做形式主语，后面的of,for,to在什么情况下使用？

it is important to learn english well.把英语学好很重要这里的to learn english well就是主语 it 的内容，it 即为一个形式主语，这是动词不定式做主语，it 也可以指一整句。

只有It 才能做形式主语？

it作逻辑主语编辑综述形式主语it 作为形式主语的it并无实际语义，只是为满足语法上的需要，避免句子头重脚轻，它代替的是句子的逻辑主语，概括起来会有如下情况：不定式作逻辑主语如：It is very kind of you to give me a hand in time.It is my pleasure to address the meeting.It was pretty hard for him to bring up the child on his own.从句作逻辑主语如：It so happened that the tickets were sold out.It is extremely obvious that she has been lying about her identity.It suddenly occurred to me that the message must have been hiddenbetween the layers of the briefcase.动名词短语作逻辑主语这类句子远不如前面两种出现率高，waste,dangerous）等词语的后面用如：It is no use reasoning with him.It is no good reading in dim light.作形式主语的代词只能用it，1） It is easier to lose friends than to make friends. 交朋友难而失去朋友比较容易。2） It is important for modern young people to master at least two foreign languages. 掌握至少两门外语对于当代年轻人来说是很重要的。真正的主语是后面的不定式短语。3） It is considered no good reciting without understanding. 不理解的背诵被认为是没有好处的。以上两句中的it是形式主语，真正的主语是V-ing形式。5） It is a fact that English is being accepted as an international language.英语作为一门国际语言正日益为人们所接受，（NMET,因为if不能引导主语从句。）以上两句中真正的主语是名词性从句。it作形式主语编辑it 作形式主语，不定式作主语、动名词作主语 和 名词从句作主语。不定式作真正主语主要用于下列句型：n. (形容词或名词） +to do sth.A. 名词作表语。It is a good idea to think this way. 这样考虑问题是个好办法。其他动词也有跟名词的情况。It requires efforts to master a foreign language. 掌握一门外语需要种种努力。It was foolish of you to leave school.你中途退学，真是傻瓜。It was brave of her to speak out in public. 她能当众大声讲话，of 的宾语可以作句子的主语。You were foolish to leave school.She was brave to speak out in public.2） 其他形容词作表语，常见的形容词有：necessary,important,difficult,easy,possible，common等。It is necessary to use a short-wave radio to pick up the programmes. 必须用短波收音机才能收到节目。如果要说明不定式表示的动作是谁做的，可以在不定式前加for + 名词或代词+ to do sth.(for 后的宾语不能作句子的主语）。名词或代词作不定式的逻辑主语，即表示不定式所指动作的执行者。在此句型中，形容词只对不定式行为者作某种描述，It is not hard for one to do a bit of good. 对于一个人来说做点好事并不难。It,s common for leaves to fall from the trees in the fall. 秋天树叶从树上落下是件常事。需要注意的是：动词不定式作主语，一般情况下用it作形式主语，也可以直接用不定式作主语。但在疑问句和感叹句中，只能用it作形式主语。Isn'出去兜一圈难道不是一个好主意吗？同你一起工作是多么愉快啊！⒊It + v. + to do sth.动词不定式作主语时除动词be以外，动词take,cost，require,make,sound,occur 等也可用it作形式主语，而把动词不定式放在后面。It took us three years to complete the project. 我们花费三年时间才完成了这项工程。It sounds reasonable to do it this way.听起来这样做有道理。It needed hard work to finish the job. 要完成这项工作需要努力地工作。动名词作真正主语用于这种形式的是一些特定的形容词和名词。It was nice meeting you. 见到你真高兴!（分别时用）它与不定式作真正主语的区别在于，动名词说到的动作已经发生。It is nice to meet you. （刚刚见面时用)it 作形式主语，动名词作真正主语主要用于下列句型：s +n.（名词或名词短语）/adj.（形容词）+ doing sth.1）下列形容词后常用动名词作真正主语：nice,hard,foolish,It is nice talking to you. 跟你交谈真是愉快。s foolish behaving like that. 这样的表现是很愚蠢的。+名词从句（主语从句、表语从句、同位语从句）⒈It is +名词+从句：这样的名词有a fact,an honor（非常荣幸），It is a surprise that you gave such an answer to the question. 你对这个问题作了这样的回答，⒉It is +形容词+从句:这样的形容词有natural,true,strange,necessary,important,obvious（很明显），certain,wonderful,funny,possible,It is probable that he has known everything. 很可能他什么都已经知道了。这样的动词有seem,happen,appear,look,matter,make,strike,It appeared that he had a taste for music. 看来他对音乐有一定的鉴赏力。It made us very happy that she was saved.她能化险为夷令我们大家很高兴。thought,It was amusing that a rabbit ran out of the empty box on the desk.桌上的空盒子里竟然跑出来一只兔子，太有趣了。需要说明的是，大部分连接词引导的主语从句都可以用 it充当形式主语。

是不是所有用it 做形式主语的句子他们的真实主语都在后面？变句子的时候只需将后面的句子提前啊

是的it 作形式主语，主要分为下列三种情况：不定式作主语、动名词作主语 和 名词从句作主语。具体分析如下不定式作真正主语主要用于下列句型：⒈It + is/was + adj./n. (形容词或名词） +to do sth.A. 名词作表语。In fact________is a hard job for the police to keep order in an important football match. （2001上海高考题）A. this B. thatC. there D. it （答案为D)动名词作真正主语用于这种形式的是一些特定的形容词和名词。It was nice meeting you. 见到你真高兴!（分别时用）它与不定式作真正主语的区别在于，动名词说到的动作已经发生。It is nice to meet you. （刚刚见面时用)it 作形式主语，动名词作真正主语主要用于下列句型：s +n.（名词或名词短语）/adj.（形容词）+ doing sth.1）下列形容词后常用动名词作真正主语：nice,good,hard,foolish,It is nice talking to you. 跟你交谈真是愉快。It'

宾语从句it做形式主语的句子

It代替从句作形式主语的常见句型 1. it 代替连词 that 引导的从句作形式主语。It's said that Tom has come back from abroad . It was reported that dozens of children died in the accident . 可用于该句型的过去分词还有：thought,该句型常可以转换成含有宾语从句的复合句或者含有不定式作主补的简单句。It's a pity that he can't swim for his age . It's a wonder that you could finish such a hard task in such a short time . 可用于该句型的名词词组还有：It is likely that they will beat us tonight .今晚很可能他们会赢我们。t seem that she will give us a hand .她帮我们的可能性似乎不太大。可用于此句型的开容词还有；wonderful,true,good,right,wrong,(un)important,clear,possible,unusual,lucky,happen + that 从句:It seems that he enjoys pop songs very much .看来他非常喜欢流行歌曲。It appears that Tom might change his mind .看来汤姆会改变主意。It happened that I went out that day .碰巧我那天外出了。2. it 代替连接代词或连接副词引导的从句作形式主语。It is still a question when we shall have our sports meet . 我们将什么时候举行运动会还是一个问题。It is uncertain whether he can attend this conference or not . 他能否来开会还不能确定。2) It doesn't make too much difference等) + 连接代词或连接副词引导的从句。如：t matter whether we go together or separately . 我们一起去还是分开去都可以。It doesn't matter too much to me what you do or where you go . 你做什么或去什么地方，对我都无关紧要