代词it的基本用法 it

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it的用法

语法：it的用法一.it 作人称代词1.it的最基本用法是作代词，指代前面所提到过的事情、事物、群体、想法，也可以指代未指明但谈话双方都明白的事情或情况。

如：The Parkers bought a new house but it will need a lot of work before they can move in.---I have broken a plate.---It (Breaking the plate) doesn’t matter.2.it也可以指代性别不明或性别被认为不重要的人或动物。

如：---Is it your dog？---No, it isn’t.二.it 作非人称代词1.指时间It is half past two now.2.指距离It is 6 miles to the nearest hospital.3.指温度It is very cold in the room.4.指天气A lovely day, isn’t it?/ It is a bit windy.5.指日期---What’s the date today? --- It’s May 1st, 2014.6.指季节It is winter now.7.指环境It was very quiet in the café.8.指价值---What’s the price of the T-shirt？---It is 150 yuan.三.it作形式主语1.it替代作主语的动词不定式（to do）(1) It be + adj. + (for sb.) to do sth.此处adj.通常为描述事件的形容词：easy, difficult, hard, necessary, possible, right, important, polite, clear, obvious, useful, dangerous, legal, illegal等。

代词it的用法

代词it的用法
1. “It”可以用来指代天气呀！比如说：“It's really sunny today.”
哎呀，想想当你抬头看着那湛蓝的天空和灿烂的阳光，说这句话的时候是不是感觉心情都超好呢！
2. 你知道吗，当我们想指代某件事情的时候，也会用到“it”呢！就像“Making a handmade gift for her is a great idea. It will make her very happy.”这里的“it”就是指做手工礼物这件事呀，难道不是很有趣吗？
3. 当我们谈论时间的时候，“it”也大显身手啦！像“Look at the time!
It's getting late.”天哪，看到时间流逝，说这句话时是不是会有点小紧张呢！
4. “It”还能指代某个动物或物品呢。

“I love my dog. It is so cute.”看
到可爱的狗狗，用“it”来指代它，是不是感觉特别亲切呀！
5. 有时候我们也会用“it”来表示一个情境或局面哟！比如“Things are getting complicated. It's not that easy.”哇，面对复杂的情况，说出这
句话是不是很有感慨呢！
6. 想象一下，我们在描述距离的时候也能用“it”呢！“The distance between us is not that far. It can be easily covered.”哎呀，想到能跨越那不远的距离，是不是有点小期待呢！
我觉得“it”的用法真是丰富又有趣，在我们日常交流中起到了很重要的作用呢！。

It的用法

3.非人称代词：it可用来表示时间、日期、天气、温度、距离、价值等。
It’s a quarter past ten. 现在的时间是10:15分。 It is raining heavily, and you’d better not go out. 天正在下大雨，你最好别出去了。４.含糊地指情况、状况。 How is it in the market?市场上的情况如何 It is quiet in the reading room. 阅览室里鸦雀无声。
如能帮忙，我不胜感激.
I hate it when I have to speak in French on the phone. 非得用法语打电话，我感到很讨厌. You may depend on it that they will support you. 你相信好了，他们会支持你的．
It 用在强调句型中 it+be+被强调部分＋that（who）+其它. It’s my back that hurts. 是我的背痛即使被强调部分是时间或地点的词也要用that , 被强调部分是人时用that /who都行． It was in the afternoon that the accident happened. 事故是在下午发生的． It was in your room that I met Bob yesterday. 我昨天就是在你的房间遇到Bob的． It is I who am in charge of this class. 是我在负责这个班．
来还不敢肯定。
B: it be +vt.过去分词+that从句如 said, told, known, reported,hoped thought,suggested, considered, recorded等 It is said that she is very good at English.

(完整版)It的用法总结

It的用法总结在英语中,it有许多不同的用法,它既可以用作代词(如人称代词、非人称代词)，也可以用作引导词（作形式主语或形式宾语），还可以用来构成强调句型。

.it用作代词(1) 用作人称代词在句子中作主语或宾语；指前面已经提到过的事物、动物或人，且it指特定的事物；如果指前文中提到的事物中的任何一个，用one。

one可以与any, each, every, not等连用，但one不可代替不可数名词。

—where’s your car?—it’s in the garage. 你的汽车在哪儿呢？在车库里。

(指代物品your car)did you hit it? 你打中了吗？ (指代事件)the baby cried when it was hungry.这婴儿饿时就哭。

（指代婴儿，尤指性别不详或无所谓时）—who is that?—it’s me. 是谁？我。

(指一定情景中所确定的人或事物，此时相当于指示代词，代指this和that,有时也指人)—what’s this?—it’s a box. 这是什么？一只箱子。

(2) 作非人称代词表示天气、日期、时间、温度、距离、价值、路程、度量、自然现象与环境等。

也可模糊地指一般情形或上文的部分或整个意思。

译成汉语时，it通常不一定译出来。

it’s a long time since they left. 他们走后很久了。

it’s two miles to the beach.离海滨有两英里远。

that’s just it—i can’t work when you’re making so much noise.原因就在这里——你弄出这么大的声音，我工作不了。

另外，需要注意两点：（1）“it’s time…”后面可以接不定式和介词短语表示“是做……的时候了”。

如：it’s time for supper. it’s time to have supper.(2) “it’s time…”后面还可以接一个从句，但是从句中的谓语动词一定要用过去式即虚拟语气，如：it’s time we had lunch.是我们吃饭的时候了。

It的用法及典型句型归纳. 个人总结

It的用法及典型句型归纳一、人称代词it的最基本用法是作代词，主要指刚提到的事物，想法，以避免重复;也可以指性别不明或性别被认为是不重要的人或动物；未指明但谈话双方都明白的事情或情况。

①They watched the train until it disappeared in the distance.②Is this your dog？No, it isn’t.③I hate it when people talk with a full mouth.．二、.非人称代词.it有时并不指具体的东西而泛指天气、时间、日期、距离、价值、度量、温度、环境等：It is a lovely day, isn’t it? // It was nearly midnight when she came back.It is April First today. // It is some 3000 kilometers from A to B.It is three dollars. // Today it is 30 degrees centigrade.三、作形式主语，替代主语从句，动词不定式，或动名词短语1.作形式主语替代主语从句⑴It is clear ( obvious，true，possible，certain....) that＂┅清楚的（显然的，真的，可能的,肯定的．．．）＂⑵It is important ( necessary，right，strange，natural...) that + (should ) do (虚拟语气)┅是重要的(必要的,对的,奇怪的,自然的┅)⑶It is said (reported/ learned/believed/thought/known/told/hoped.....) that= sb / sth is said (reported/ believed /thought…) to do( to be doing/ to have done) sth＂据说（据报道，据悉．．．）＂。

人称代词it的用法总结

人称代词it的用法总结人称代词在英语中起着非常重要的作用，它们可以替代特定的名词或名词短语，以避免过多重复。

其中一个常见的人称代词就是"it"。

下面将详细总结"it"在不同情况下的用法。

一、指示事物或物体1. 指代单数名词：当我们第一次提到某个具体事物或物体时，可以使用"it"来指代。

例如：- Look at the beautiful flower! It is in full bloom.- The new car is expensive, but it's worth every penny.2. 指代抽象事物：当我们谈论关于天气、环境或其他抽象概念时，也可以使用"it"来指代。

例如：- It is raining heavily today.- It seems that there will be a storm tonight.3. 表示距离或方位：当我们谈论远处或方向时，常使用"it"来表示。

例如：- I can see the lake from here. It looks beautiful.- Turn left at the next intersection. It's just around the corner.二、指示时间和日期1. 表示时间：当我们描述时间时，可以使用人称代词"it"。

例如：- Is it already 10 o'clock? We need to hurry.- It's late, we should go home now.2. 指示日期：当我们谈论某个具体的日期时，也可以使用"it"。

例如：- I have an important meeting on Friday. It's going to be a long day.- The party is on Saturday night. It starts at 8 o'clock, so don't be late.三、指代动物和婴儿1. 指代动物：当我们不知道或不关心动物的性别时，可以使用"it"来指代动物。

it作为代词的用法总结

it作为代词的用法总结一、it 作为人称代词1. 表示特指的人或物：当我们想要提及已经被提到过的人或物时，可以使用 it 来代替。

例如：I saw a bird in the garden this morning. It was singing beautifully.2. 表示不具体指向的事物：当我们谈论天气、时间等与特定对象无关的概念时，可以使用 it。

例如：It is raining outside.What time is it?3. 用于强调句子中的主语或宾语：在强调句型中，it 可以用来指代原本句子中的名词，并将其放在句首。

例如：It was John who ate all the cake.It was the cat that knocked over the vase.二、it 作为形式主语或形式宾语1. 当真正的主语或宾语是一个从句时，我们通常使用 it 作为形式主语或形式宾语。

例如：It is important to exercise regularly.I find it difficult to understand his accent.2. 当强调整个动作而不是特定执行者时，也可使用 it 作为形式宾语。

例如：I find it interesting to learn new languages.She found it hard to say goodbye.三、it 作为虚主语1. 在一些较长的句子中，如果没有一个具体的主语和动词，我们可以使用 it 占据主语的位置，以保持句子的语法结构平衡。

例如：It is important to study before the exam.It seems that nobody is home.2. 在许多固定短语中，it 作为一个虚拟主语引入一个句子。

例如：It is said that he will be promoted soon.It doesn't matter if we arrive late.四、it 作为指代前文提到的内容1. 当我们在上下文中已经谈论过某个事物，并且想要通过代词回指时，可以使用 it。

it用法总结ppt课件

3). It be ... before ... 该句型主句中的 it 指时间，主句中的时态常是一般将来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．．．”。
It was 3 days before he went to Beijing. It will be not long before he finishes his job.
8
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.
②. It is suggested ( ordered /demanded/insisted/commanded... ) that ...
②. It is important ( necessary， right， strange， natural...) that ... that 后的从句中要用虚拟语气（should + 动词原形）， should 可以省去，建议记住该句型中的形容词。 It is important that we (should) learn English well.
It is time that children went to bed.
② It is the first ( second ... ) time that ... “是第一（二）．．．次．．．”。
It is the first time I have been here. = This is the first time I have been here.

it 的用法

"it" 是英语中的代词，用于指代前文提及的事物或物体。

以下是一些常见的 "it" 的用法：
1. 代替上文提到的名词：例如，“I have a dog. It is very playful.”（我有一只狗。

它非常
好动。

）
2. 引入一个概念或情况：例如，“It is raining outside.”（外面正在下雨。

）
3. 强调某个事物的特点或状态：例如，“It is important to study hard.”（努力学习很重要。

）
4. 作为形式主语或形式宾语：例如，“It is said that she is a talented singer.”（据说她是一
位有才华的歌手。

）
5. 在口头交流中，用于表示不确定的事物：例如，“Can you pass me the book? I need it.”（你能把书递给我吗？我需要它。

）
请注意，在具体的语境中，"it" 的用法可能会有所不同。

It 的用法

It 的用法在英语中，It有许多不同的用法，它既可以用作代词（如人称代词，非人称代词），也可以用做引导词（作形式主语或形式宾语），还可以用来构成强调句型等。

一、It 用做人称代词1.It 可用作人称代词，指前面已经提到的事物，动物或人,指人主要用于指性别不明的婴儿或用于确认某人的身份。

He bought a dictionary and gave it to me.The bady is crying. It might be hungry.Someone is ringing. Who might it be?Professor Lee gave us a lecture yesterday. It was of great interest.【说明】在答语中，常用来指本人，如说It's me。

二、It 用作指示代词1.在"It is/was+表语"结构中，it指明某人或某物的身份，如：①—Who is there downstairs? —It's the postman.②—Who is there talking? —It's your father.2.指代this 或that以及复合不定代词something, anything, nothing等。

①—What's that on the desk? —I guess it might be a robot.②This is your plan, isn't it? ③Nothing is wrong, is it?三、It 用作非人称代词It 用作非人称代词，常指代天气，季节，距离，时间或事物的状态。

It was raining when I left the office.It's February 14th today. It's a long time since we met last time.It's an hour's walk from my home to the school.It's so noisy in the room.四、It 用作形式主语当不定式、动名词、从句等复杂成分用作句子主语时，为保持句子平衡，通常把真正的主语放在句末，而在句首使用形式主语it。

it五种用法归纳

it五种用法归纳好嘞，以下是为您创作的关于“it 五种用法归纳”的文案：咱们在学习英语的过程中，it 这个小小的单词可有着大大的作用呢！今天咱们就来好好归纳一下 it 的五种常见用法。

先来说说 it 用作人称代词的时候。

比如说，“It is a dog”在这儿，it就用来指代一只狗。

想象一下，你走在路上，突然看到一只毛茸茸的小狗在路边玩耍，你指着它跟朋友说：“Look! It is so cute!” 这里的 it 就是明确地指代了那只让你觉得可爱的小狗。

it 还能用来表示天气、时间、距离等。

比如说“It's sunny today” （今天阳光明媚。

）当你早上推开窗户，感受到那温暖的阳光洒在脸上，你就会自然而然地说出这句话。

又比如“It's five o'clock”（现在五点钟了。

）你看着墙上的时钟，指针指向了五，你就清楚地知道该做什么事情啦。

再比如“It's ten kilometers from my home to school” （从我家到学校有十公里。

）想象一下，你每天上学都要走这么长的距离，是不是就能深刻体会到这种用法啦。

it 作非人称代词也很常见哦。

像“It's difficult to learn English well”（学好英语很难。

）当你为了背单词、学语法而感到头疼的时候，是不是就会有这样的感慨呢。

还有呀，it 可以用来构成强调句型“It is/was ＋被强调部分＋that/who ＋其他部分”。

比如说“It was Tom who broke the window” （是汤姆打破了窗户。

）就好像你在教室里，突然听到玻璃破碎的声音，大家都在猜测是谁干的，最后发现是汤姆，这时候强调句型就能很好地表达出来啦。

最后，it 还能用于某些固定句型中，比如“make it”（成功；做到）。

当你一直努力准备考试，最后终于取得了好成绩，你就可以骄傲地说：“I made it!” （我做到了！）总之，it 的用法多种多样，咱们在学习的过程中要多留意、多练习，这样才能熟练掌握。

高考英语：it的用法

It would be a pity to miss this opportunity. It's no good standing here in the cold. Let's go home.
2）真实主语是主语从句。常见句型如下： a. It + be +名词+主语从句。如：
It is a great pity (that) he can't swim. It was no accident (that) such a book (should) appear in the 18th century. It was a puzzle whether he should get married. It was a mystery how the thieves got in.
from a store kman that Alice bought from a store last week. （强调宾语a walkman）
③It was from a store that Alice bought a Walkman last week. （强调地点状语from a store）
4. 强调句型用于特殊疑问句，被强调的通常是疑问词。
注意：此强调句型不能强调谓语动词。若需强调谓语动词，常用“助动词do / does / did + 动词原形”。
四、一些含it的固定句型 As someone puts it, ... 像某人所说的那样，…… Please see to it that ... 请务必…… When it comes to ... 当提到……时 It looks / seems as if ... 看起来好像…… It's time for sth. 该做某事了

“it”的用法

It doesn’t matter (to sb.) wh- 从句 “…没有关系” It makes a/no/some difference (to sb.) +wh—从句 “…有关系/影响” It makes no difference to me where you come from.
作形式主语替代ing形式
It is a pity that such a thing ( should ) happen in your class.
It is (high) time that
sb. did…
sb. should do…
It is time that children went to bed.
It is/was the first ( second ... ) time (that) sb. has/had done…
It is important that we (should) learn English well.
2）.It is +v-ed +that(不可省) 从句 ① It is said (reported, learned,believed..)that .. 据说（据报道，据悉．．．）“。 It has been proved/announced/confirmed/ pointed out that… “已经证明/宣布/证实/指出…”
3. 他非常清楚地表示他对那门学科不感兴趣.(clear) He __________________he was not interested made it clear that in this subject.
4. Peter 习惯饭后散步. (rule) Peter _________________________after dinner makes it a rule to take a walk

it用法大全(形式宾语形式主语)

It is suggested that the meeting ( should ) be put off.
3）.It +n+that ... 1. It is a pity ( a shame ... ) that ...
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 doesn’t matter if they are old.
.2.作形式主语替代不定式
1). It takes sb. ... to do sth. ＂做．．．要花费某人．．＂ It took thousands of people many years to build the Great Wall.
2.非人称代词it
it有时并不指具体的东西，而泛指天气、时间、环境等，称为非人称的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.
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.
难怪他不愿去。在该句型中如果用肯定形式，表示“真奇怪，真是令人惊讶”；
It is a wonder that he reused such a good offer.

it是什么代词

it是什么代词
it用作人称代词、指示代词、非人称代词。

用作替代词：it可作形式主语、形式宾语，可代替不定式、动名词或从句。

扩展资料
(1) it用作人称代词
it用作人称代词，一般指未知或不明身份的.人。

例句：Who is it in the room? Open the door!
谁在房间里啊？把门打开！
(2) it用作指示代词
作指示代词时，it的用法相当于this或that。

有时候it并不特指某件具体的事物，而是代表前面提到的、或者即将提到的某件事情。

例1：She said it was a very popular film, but I don't like it.
她说那是一部非常流行的电影，但我却不喜欢（它）。

例2：She does not really treat me as a family member, and it has hurts me badly.
她并没有把我当家人看待。

这就让我很受伤。

(3) it作非人称代词
代词it还可以用来指代时间、距离、价值、天气、温度、环境等无生命的抽象事物，无阴阳之分。

例1：—What time is it by your watch? 你的表到几点了？
—It is 9:39 9点39。

例2：It is really quiet in the woods.
小树林里真安静。

it的用法

it的用法1.It用作代词:用来指代前面提到的事情，是单数。

(1)用作人称代词，代替上文提到的人或事物。

e.g. ——Who is it?——It’s me. You’ve helped me a lot; I’ll never forget it.(2) 用以代替指示代词this或that。

e.g. ①——What’s this?——It’s a computer．②——Whose book is that?——It's hers．(3)表示时间、天气、距离、价钱等。

e.g. It’s time for lunch．It’s raining hard．It’s two miles from the school to our home．(4)在不清楚性别的情况下也可以用来指代人。

e.g. ——Someone comes to visit you at the gate of the school.——Who is it?2. it作形式主语（1）It is + difficult/ hard / easy / important / necessary + for sb. to do sth. 干某事对某人来说是怎么样的。

（2）It is + kind / good / nice / clever of sb. to do sth. 某人做某事是怎么样的。

e.g. It is useful for you to learn English well.It’s too hard to understand spoken English.It is important for us to protect the environment.It’s very kind of you to help m e.（3）主语从句：that引导的主语从句既可放在句首，也可放在句末。

但是为了保持句子的平衡，常用it作形式主语，把真正的主语从句放在句后；e.g. That he is a doctor is true.=It is true that he is a doctor.It is surprising that she is so angry.That he survived the accident is a miracle.=It is a miracle that he survived the accident.①It + be +名词+ that从句；e.g. It is a fact that…It is common sense that…It’s a pity/a shame/a question/ an honor/a wonder…that…②It + be +形容词+ that从句；e.g. It is certain/clear/evident/likely/probable/better/natural that…③It + be +过去分词+ that从句；e.g. It is said/demanded/believed/reported/estimated that…④It +不及物动词+ that从句e.g. It seems/happened/follows/matters/occurred to me/struck to me that…(4) It is + 序数词+time that从句（用现在完成时）.It was + 序数词+time that从句（用现在完成时）.e.g. It is the first time that I have seen the movie.It was the third time that Tom had come to the place.(5)专题练习①It is high time _______ us to do something to improve our environment.②It is the first time that the girl ____________(see)a panda.③Believe me, I know how easy it is to begin smoking and how tough _______ is to stop.④It is no use _________ （argue )with Bill because he will never change his mind.3. it作形式宾语(1)find / feel / think+ it + 形容词+ to do sth. 发现/感到/认为干某事是怎么样的e.g. Why did Wei Fen find it difficult to learn English?I find it difficult (for Lily) to learn math well.=I find that it is difficult for Lily to learn math well.Wang Dan found it important to learn English well.(2)宾语从句：如果宾语后跟有补语，常用it作形式宾语，而将从句放到补语之后；e. g. They kept it quiet that he was dead.I heard it said that the meeting would be postponed.(3)专题练习①We find ___necessary to work hard to achieve our dream.②Susan made ________ clear to me that she wished to make a new life for herself.③I would appreciate it _____ you could let me know in advance whether or not you will come.4. it用于强调句型中，其结构是: It is / was + 强调部分+ that + 原句剩余部分。

it的用法、常用句型

He hates it when people use his bike.
I’d prefer it if I didn’t have to do so much
work.
I would appreciate it very much if you would
help me with it.
b. 动词+介词+ it + that从句能用于此句型的主要有：depend on, answer for, see to。如： You may depend on it that he will turn up in time.
reputation of an honest man.
It was no accident that such a book should
appear in the 18th century. 2) “It + be +形容词+主语从句”中从句谓语常用 “（should +）动词原形（或完成时）”。常用于本句型的形容词主要有impossible, strange,
2. —Steven’s parents have bought him a computer.
—__I_t _ __is__ __n_o_ _w__o_n_d_e_r_ (难怪) that he looks so happy.
3. Susana’s aim is to tell all citizens they have a duty to protect the environment, _is_n_’_t_ __it_ (对吗)?
2. Raise your leg and let 65 stay in the air for seconds. （辽宁2014第三部分）

it用法完全归纳

it⽤法完全归纳it⽤法完全归纳⼀、it 作⼈称代词的⽤法1. 指事物作为⼈称代词，it 可以指代除⼈以外的⼀切事物或动物。

如：I dropped my watch and it broke. 我把⼿表掉在地上摔坏了。

It’s hard work, but I enjoy it. ⼯作很⾟苦，可是我乐意⼲。

“Where is the dog?” “It’s in the bedroom. ” “狗在哪?”“在卧室⾥”。

2. 指⼈it 指⼈主要⽤于指性别不明的婴⼉或⽤于确认某⼈的⾝份。

如：Is it a boy or a girl? 是男孩还是⼥孩?There is a knock on the door. It must be the postman. 有⼈在敲门，⼀定是邮递员。

【说明】在答语中，常⽤来指本⼈，如说It’s me.3. 代替某些代词代词it 还可⽤于代替指⽰代词this, that 以及复合不定代词something, anything, nothing等。

如：“What’s this?” “It’s a new machine. ” “这是什么?”“是⼀种新机器”。

Nothing is wrong, is it? 没出什么问题，是吗?⼆、it 作⾮⼈称代词的⽤法1. 基本⽤法it 作⾮⼈称代词的⽤法，主要⽤于指时间、距离、价值、天⽓、⽓候及温度等⾃然现象。

如：It’s too late to go there now. 现在去那⼉已经太迟了。

It rained all day yesterday. 昨天下了⼀天的⾬。

It can get very hot here. 这⾥有时会很热。

2. ⽤于某些句型It’s time for sth. 该做某事了。

It’s time to do sth. 该做某事的时候了。

It’s time for sb to do sth. 某⼈该⼲某事了。

It 的用法

13. 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 thousands of people many years to build the Great Wall. 14. It doesn’t matter whether... 该句型中whether引导的从句是真正主语，译为 “不论（是否）．．．没关系．．．。 It doesn’t matter whether they are old.
部分 it既可强调现在的情况，也可强调过去的情况。
We called on Professor Wang in his office this morning. It was we who/ that called we on Professor Wang at his office this morning. Professo It was Professor Wang r whom/ that/ who we called Wang on at his office this morning.
15. 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。这个句型等于： sb. be kind to do sth. 。 It is kind of you to say so. = You are kind to say so.