超详细的It的用法归纳总结(附习题及答案)!

---------------------------------------------------------------最新资料推荐------------------------------------------------------it的用法(专项总结及训练)It 的用法（专项总结及训练）一、人称代词 1. it 的最基本用法是作代词，主要指刚提到的事物，以避免重复: ①They watched the train until it disappeared in the distance. 2. 也可以指动物或婴儿(未知性别的婴儿或孩子): ①Is this your dog？No, it isnt. ②They got a baby and it was a ten-pounder 3. 也可指抽象事物或指抽象环境和情景: ①I hate it when people talk with a full mouth.．二、非人称代词 1. 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：①指天气：It is a lovely day, isnt it? ②指时间: It was nearly midnight when she came back. ③指日期:It is April First today.④指距离:It is some 3000 kilometers from Beijing to Guangzhou.⑤指价值:It is three dollars. ⑥指温度:Today it is 30 degrees centigrade. 三、其他用法 1.在句子的主语不太明确时充当主语，表示谁在做某事：①Who is it there? It’s I (me/you/he.....). 2.泛泛的指某件事：(有时泛指一般情况) ①It doesnt matter. ②How is it going?(情况怎样) 3.it 用在一些词组中， it 没有特别的意思1/ 11The last train’s gone. Come on, we’ll foot it.(来，咱们步行吧。

（完整版）it做形式主语用法大全含练习及答案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 h e 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，wise6. 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。

高考英语专题之it的用法1.指代上文提到过的某物。

2.指代this和that。

3.指不知性别的婴儿或身份不明确的人。

4.指时间、距离、天气、气候、温度、日期或价值。

5.it代替不定式、动名词短语或名词性从句做形式主语。

（1）It is+adj.for /of sb. to do sth.（2）It is no wonder that...……不足为奇/并不奇怪（3）It seems/appears that...似乎/看来……（4）It looks/seems as if/as though...看起来/似乎/好像……（5）It happens that...碰巧……（6）It occurs to/comes to/strikes/hits sb. that...某人突然想起……（7）It is said/reported that...据说/据报道……（8）It is certain that...肯定……（9）It is well known/acknowledged that...众所周知……（10）It is no use/no good doing sth.做某事没用/没好处（11）It takes sb. some time to do sth.做某事花某人一些时间（12).It is clear (obvious, true, possible, certain) that….“清楚（显然、真的、肯定）”（13).It is important (necessary, right, strange, natural…) that…（虚拟should+动词原形）（14).It is suggested (ordered…) that…（虚拟should+动词原形）（16）. It doesn’t matter whether………不重要，没关系(17).It is a pity/shame that...真可惜……6.it做形式宾语（1）主语+think/believe/suppose/consider/feel/make/keep...+it+adj./n.+for/of+sb.to do sth./that从句（2）主语+think/believe/suppose/consider/feel/make/keep...+it+unless/no use/no good...doing sth.7.其他与it相关的常用短语和句型(1)I take it that you don't agree with me.我想你不同意我的意见。

It的用法It的用法在高考中也是重现率较高的语言点，尤其是it用于强调句。

其考查方式多通过“单项填空”进行，偶尔也出现在“短文改错"和“完形填空"中。

一、要点点拔1．代替上文中提到过的人或事物.指代人时，一般用于小孩或身份不十分明朗的人。

1）－Who is the baby？－It‘s my teacher’s son．2）－Who is that gentleman?－It’s my friend Tom．He(不可用It） wants to see you．2．用于表达天气、环境、时间、距离、季节等.例如：1） It's half an hour’s walk from here to our school．2） It‘s nice and warm here．3) But it’s two o’clock now， and it’s time for us to go to school．3．用作形式主语。

it 没有具体意义,而只是帮助把真正的主语移至句子后尾,使句子显得平稳一些，能借it 给移至句子后尾的主语有三种:一种由不定式表示，一种由动名词表示，一种由从句表示。

1)。

It 替代真正的主语-—动词不定式短语。

It is easier to say than to do 。

It is a good act to help the others.2）.it 替代真正的主语——动名词短语，以动名词短语做主语的句子,主要在以no good, no use， no harm, dangerous， foolish 等词作表语的句中.It’s no harm drinking running water in that area。

It’s foolish talking like that.3)。

it 替代从句作主语，用从句做主语的带it 的句子很多，常见的有下面几类：① It is a pity (a shame ，a fact ，a wonder ，a good thing，etc. )that…It is a shame that he didn’t pass the exam。

（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用法小结及练习一．作代词（指天气、温度、时间、距离等或代替前文提到过的事物。

）1. 今天天气晴朗。

2. 今天是星期二。

3. 学校到我家10分钟的步行路程。

4.我有一本字典，它使我聪明。

5 我没有字典，你能借我一本吗？二. 作形式主语1.Playing computer games all day long is a waste of time.=It is a waste of time playing computer games all day long.2.To learn English well is important for us.=It is important for us to learn English well.3. That we students should be kind to others is necessary.=It is necessary that we students should be kind to others.总结：it还常用于以下句型中It is strange/ important/necessary t hat…(should) do…It is no use /no good /a waste of time doing sth.It is/was thought （believed，said，reported）that sb / sth do/ have done…= sb/sth is/was said to do/ have done…Exercises1:1).对我们来说学一门外语是必要的。

2).经常帮助同学她真是太好了。

3).据说杰克已经通过了考试。

Exercises2:1). Aids is said __ the biggest health challenge to both men and women in that area in the past few years.A. that it isB. to beC. that it has beenD. to have beenIt is said that Aids has been the biggest health challenge to both men and women in that area in the past few years.2).The flu is believed _______ by viruses(病毒)that like to reproduce in the cells inside the human nose and throat.A. causingB. being causedC. to be causedD. to have caused3). ---Is Bob still performing?---No. He is said __ the stage already as he has become an official.A. to have leftB. to leaveC. to have been leftD. to be left句型总结：It is said that Aids has been the biggest health challenge t o…It is believed that the flu is caused by viruses that---It is said that he has left the stage already ---三．it 作形式宾语，常用句型如下：(think, feel, make, find, believe, consider…) + it + adj./ n. to do/ doing / that…1)He feels it his duty to help others.2)We found it impossible to finish the work in a day.3)We thought it no good working all the time.4)He made it clear that we shouldn’t break the school rules.Exercises1.她发现用英语回答这问题很难。

“It”用法及其句型和固定搭配讲解"It" 用法及其句型和固定搭配，是高中英语语法的重点、难点，又是近几年高考的热点，因此应给予充分的重视，现将it用法归纳如下：一、It用作实词表达以下概念:指代前文提到的事物，前文中的this, that；替代前文中的内容；指代一位性别不明的小孩或未知的人；指代未指明但谈话双方都知道的那件事；指代时间、天气、气候、距离等自然现象……二、It用作形式主语替代作主语的从句、动词不定式、动名词，而把真正作主语的从句、动词不定式、动名词置于句尾。

It 作形式主语的常见句型：1. 代作主语的动词不定式，其句型为(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, unnecessary, possible, impossible, likely, unlikely, right, wrong, important, unimportant, legal, illegal, well-mannered, ill-mannered, polite, impolite, clear, obvious, certain, suitable, proper, fit, useful, useless, dangerous…例It is illegal (for a teenager) to drive a car without a license.(2) It be adj. of sb. to do sth.此处adj. 通常为描述人的形容词：kind, unkind, nice, rude, cruel, considerate, thoughtful, thoughtless, careful, careless, silly, foolish, stupid, clever, wise, crazy.例It's kind of you to help me with the problem.(3) It替代作主语的动名词的常见句型It's no good/use doing…It's (well) worth doing…It's (well) worth one's while doing/to do…It's (well) worthwhile doing/ to do例It's no use crying over spilt milk.2. It替代作主语的从句常见句型(1) It is + noun +从句例It is no secret that the president wants to have a second term at office.(2) It is adj. +clauseIt's surprising that…(should)………竟然……It's a pity/shame that…(should)………竟然……例It's important that you should apologize to her for your rudeness.(=It's of much importance that you should apologize to her for your rudeness.)(3) It verb sb. + clause= It is v-ing + clauseIt+surprise/delight/interest/disappoint/worry/disturb/annoy/amaze/bother/concern/frighten/please/anger sb. that…例It worried me that she drove so fast.(= It was worrying that she drove so fast.)(4) It verb (to sb.) that…= sb/sth verb to do(verb = appear, seem, come about, emerge, follow, chance, happen, occur, transpire, turn out , work out)例It (so) happened/chanced that they were out.(= They happened/chanced to be out.)(5) It is v-ed that…=sb/sth is to do(verb=say, report, think, believe, hope, expect, agree, accept, decide, determine, intend, plan, understand, know）例It is said that the couple have gotten divorced.(=The couple are said to have gotten divorced.)(6) It is v-ed that … (should)…(Verb=demand, request, require, order, suggest, advise, recommend例It is suggested that they should begin with the third question.三、It作主语的句型1. It takes sb. …to do…(=sb takes…to do…)某人用多长时间做某事例It took the men a week to mend our roof.(= The men took a week to mend our roof.)2. It's (just)(un)like sb. to do…（不）像某人做某事的风格例It was (just) like him to think of helping us.3. It's (about/high) time that…should /v-ed…是该做某事的时候了例It's(about/high) time that we should take action.4. It's the x-th time (that) …have v-ed…第几次做某事了例It's the third time that he has failed the driving test.5. It is/has been…since …continuous v-ed(延续性动词) 某动作已有多长时间不发生了例It's 10 years that he lived here6. It was(not)…before…过(不)了多长时间某动作发生了例It was not long before they arrived.四、It 作形式宾语用来替代作宾语的从句、动词不定式、动名词，而把真正作宾语的从句、动词不定式、动名词置于句尾。

It的用法It的用法在高考中也是重现率较高的语言点，尤其是it用于强调句。

其考查方式多通过“单项填空”进行，偶尔也出现在“短文改错”和“完形填空”中。

一、要点点拔1．代替上文中提到过的人或事物。

指代人时，一般用于小孩或身份不十分明朗的人。

1) －Who is the baby? －It‘s my teacher’s son．2) －Who is that gentleman?－It's my friend Tom．He(不可用It) wants to see you．2．用于表达天气、环境、时间、距离、季节等。

例如：1) It’s half an hour’s walk from here to our school．2) It‘s nice and warm here．3) But it's two o'clock now, and it's time for us to go to school．3．用作形式主语.it 没有具体意义，而只是帮助把真正的主语移至句子后尾，使句子显得平稳一些，能借it 给移至句子后尾的主语有三种：一种由不定式表示，一种由动名词表示，一种由从句表示。

1).It 替代真正的主语——动词不定式短语.It is easier to say than to do .It is a good act to help the others.2).it 替代真正的主语——动名词短语,以动名词短语做主语的句子，主要在以no good, no use, no harm, dangerous, foolish 等词作表语的句中.It’s no harm drinking running water in that area。

It’s foolish talking like that.3).it 替代从句作主语，用从句做主语的带it 的句子很多,常见的有下面几类：① It is a pity (a shame ,a fact ,a wonder ,a good thing,etc. )that…It is a shame that he didn’t pass the exam.② It is strange ( surprising,obvious ,true, good,possible,clear,etc. ) that… 。

2021年高考英语三轮复习：it的八大考点总结It的用法要点颇多，在高考题中经常出现。

下面笔者结合高考题详解it的八大经典考点。

一、It作形式主语【考例】______ is generally accepted that a boy must learn to stand up and fight like a man.A. ThisB. ThatC. ItD. What解析：选C。

it作形式主语，真正的主语是that引导的主语从句。

【考点】it 作形式主语主要用于以下句型中：1. It’s no use / good doing sth.It is no use arguing with Tom because he will never change his mind. 与汤姆争吵是没有用的，因为他绝不会改变主意。

2. It + be + adj. + of / for sb. to do sth.①It is not always easy for the public to see what use a new invention can be of to human life. 公众很容易明白一项新的发明对人类生活有什么用途。

②It is very kind of you to help me out of the trouble. = You are very kind to help me out of the trouble. 你帮助我摆脱困境，真是太好了。

3. It happens / appears / seems that…It happened that I was reading a book when a stranger knocked on the door.我正在看书的时候，这时碰巧有个陌生人敲门。

4. It + be + adj. / n. / 过去分词+ that…①It is our hope that all the students in our class will enter the famous universities. 我们希望我们班所有的学生都能上名牌大学。

超详细的It的用法归纳总结（附习题及答案）!
超详细的It的用法归纳总结（附习题及答案）！
一、It是代词
指除人以外的一切生物和事物，用来指代时间、季节、天气距离、环境。

在这里，i是一个虚词，没有任何实际意义。

例如:
①It is a quarter to eight now.
现在是八点差一刻。

②It is midnight. 现在是午夜。

③It is time for breakfast.
现在是吃早饭的时间。

④-What is the date today?今天几月几号?
--It is December 3rd. 十二月三号。

⑤--What season is it?现在是什么季节?
--It is summer. 夏季。

⑥--What is the weather like today?
今天天气如何?
--It is fine.天气很好。

--It is foggy and wet.天气多雾又潮湿。

⑧How far is it from the bus station to your home? 从汽车站到你们家有多远?
⑨It is around five miles to the shopping center.从这儿到购物中心大约有五英里。

It的用法It 的用法在高考中也是重率高的言点，尤其是it 用于句。

其考方式多通“ 填空” 行，偶也出在“短文改”和“完形填空”中。

一、要点点拔1．代替上文中提到的人或事物。

指代人，一般用于小孩或身份不十分明朗的人。

1)－Who is the baby?－It‘s my teacher’s son．2)－Who is that gentleman?－It's my friend Tom ． He( 不可用 It) wants to see you ．2．用于表达天气、境、、距离、季等。

例如：1)It ’s half an hour ’s walk from here to our school ．2)It ‘s nice and warm here．3) But it's two o'clock now, and it's time for us to go to school．3．用作形式主 .it 没有具体意，而只是帮助把真正的主移至句子后尾，使句子得平一些，能借 it移至句子后尾的主有三种：一种由不定式表示，一种由名表示，一种由从句表示。

1).It替代真正的主——不定式短.It is easier to say than to do .It is a good act to help the others.2).it替代真正的主——名短,以名短做主的句子，主要在以no good, no use, no harm, dangerous, foolish等作表的句中.It ’s no harm drinking running water in that area 。

It ’s foolish talking like that.3).it替代从句作主，用从句做主的it 的句子很多 ,常的有下面几：①It is a pity (a shame ,a fact ,a wonder ,a good thing,etc. )that ⋯It is a shame that he didn ’tpass the exam.②It is strange ( surprising,obvious ,true, good,possible,clear,etc. ) that ⋯。

“IT”用法考点精讲和精练“IT”用法考点精讲与精练山东高青孙玉忠it 是近年来高考的热点之一。

它不仅可以指代时间、地点、天气、距离等，还可以作形式主语和形式宾语，同时还可以用于强调句结构中。

下面结合高考试题来谈谈它的用法，希望能对同学们有所帮助。

考点一、it作代词时的用法1．用作人称代词，代替前文提到的事，例如：The snake is not a warm—blooded animal. It’s a cold blooded one. 蛇不是温血动物，它是冷血动物。

【高考链接】I hope there are enough glasses for each guest to have ______.A. itB. thoseC. themD. one解析：本题答案为D。

本题考查代词词义辨析。

one 指代上文出现过类似的事物；it 指代上面的提到过的事物；them 指代上文中提到过的事物的复数形式；those 指代那些事物。

根据本句意义，可知最佳答案为D。

2．用以代替指示代词，例如：---What’s this ? ---- It’s a book. ----这是什么？---- 这是一本书。

3．起指示代词的作用，指一个人或事物，例如：----Who’s knocking at the door ? ---- It’s me .---谁在敲门？----- 是我。

4．指时间、季节、天气、距离、环境等，例如：It’s very cold outside. Put on more clothes. 外面非常冷，多穿点衣服。

5.替代词“it, one与that”区别和联系it用来指代前面提到的同一个事物或人；one用来指代前面同名异物的名词, 指的是同类中的一个，所以属于泛指，相当于“a/an+名词”。

one只能代替可数名词，其复数形式是ones；that用来指代前面同名异物的名词，指的是同类中的一个，属于特指，相当于“the+名词”。

It 的用法It 的用法在高考取也是重率高的言点，特别是it 用于句。

其考方式多通“ 填空” 行，偶也出在“短文改”和“完形填空”中。

一、重点点拔1．取代上文中提到的人或事物。

指代人，一般用于儿童或身份不十分明亮的人。

1)－Who is the baby?－It‘s my teacher’s son．2)－Who is that gentleman?－It's my friend Tom ． He( 不行用 It) wants to see you ．2．用于表达天气、境、、距离、季等。

比如：1)It ’s half an hour ’s walk from here to our school ．2)It ‘s nice and warm here．3) But it's two o'clock now, and it's time for us to go to school．3．用作形式主 .it 没有详细意，而不过帮助把真实的主移至句子后尾，使句子得平一些，能借 it移至句子后尾的主有三种：一种由不定式表示，一种由名表示，一种由从句表示。

1).It代替真实的主——不定式短.It is easier to say than to do .It is a good act to help the others.2).it代替真实的主——名短,以名短做主的句子，主要在以no good, no use, no harm, dangerous, foolish等作表的句中.It ’s no harm drinking running water in that area 。

It ’s foolish talking like that.3).it代替从句作主，用从句做主的it 的句子好多 ,常的有下边几：①It is a pity (a shame ,a fact ,a wonder ,a good thing,etc. )that ⋯It is a shame that he didn ’tpass the exam.②It is strange ( surprising,obvious ,true, good,possible,clear,etc. ) that ⋯。

it的用法归纳it既可以用作代词，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。

一、用作代词——这是it的基本用法。

1. 指事物-----指代上文或刚提到的事物，以避免重复。

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”。

Shanghai is a beautiful city, isn’t it?2. 指人-----指代未知性别的婴儿或身份不明确的人。

----Is this your dog？-----No, it isn’t.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.Someone is knocking at the door. Who can it be?【说明】在答语中，常用来指本人，如说It’s me。

3. 代替某些代词。

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?4. 指抽象事物:It was a great surprise to me when he did a thing like that．You’ve helped me a lot. I shall never forget it.I tried my best to persuade him to give up smoking, but it didn’t help.[辨析] 代词it ,one 和that.（1）it代替的是前面提到的同一名称的同一事物，即同名同物。

it的用法及强调结构（附常见考点解析及精选练习题）it的用法及强调结构I. 作代词1. 用作人称代词，代替前文提到过的事物（是同一物）。

My pen is missing. I can’t find it anywhere.I was disappointed with the film. I had expected it to be much better.2. 代词it有时不特指某件东西，而代表前面提到的整个事情。

Tom’s mother kept telling him that he should work harder,but it didn’t help. (but连接两个并列分句，而不是非限制性定语从句，用it)The weather turned out to be very good,which was more than we could expect. （前面用逗号隔开，没有并列连词，是非限制性定语从句，which指代前面整个主句所表达的内容，用which不用it）3. 用来代替指示代词this,that.--- What’s this ?--- It’s a book.4. 表示时间、距离、天气、价值等。

It’s ten o’clock now.（指时间）---How far is it from here to the station?---It's about two kilometers.（指距离）It is rather cold today, isn't it?（指天气）---What's the cost of the dictionary?---It is twenty dollars.（指价值）5. 可用来指做某个动作的人或与某事有关系的人。

---- Who is making such a noise ? --- It must be the children.II. 引导词it1. 作形式主语，代替由不定式短语、动名词短语或从句表示的真正主语。

中考it用法总结与练习it用法总结与练习it是英语中的重要单词之一，也是中考中经常考到的词汇，中考中经常考查的题型有单项填空、完形填空等；考查的内容有：①it作人称代词的用法；②it表示时间、天气、距离等的用法；③it作形式主语或形式宾语的用法。

一、it作人称代词的用法it用作代词，意为“它”，既可以指物，也可以指人。

it作人称代词，可以用来代替一个名词、一个短语、一个从句或一个句子，以避免它们在句中的重复。

这时它可以指提到过的，也可以指未提到过的，在句中作主语、宾语或表语。

例如：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。

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

It’s hard work, but I enjoy it. _____________________________。

—Where is the dog? 狗在哪？—It’s in the bedroom. 在________里。

You have __________________; I shall never forget it. 你救了我的命，我永远不会忘记的。

2. 指人it 指人主要用于指性别不明的婴儿，并不确知的某人，只听其声而不见其人的人，或用于确认某人的身份。

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

(在答语中，常用来指本人，如说 It’s me.。

)—Listen! Someone ____________. 听！有人在哭。

—Oh, it must be Mary. 噢，一定是玛丽。

Someone must ____________ (be) here. But we have no idea who it was. 刚才一定有人来过这里，但我们不知道是谁。