it句式的用法归纳

it句式的用法归纳（精选7篇）

it句式的用法归纳 第1篇

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 指人主要用于指不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’s(about / high)time + that-从句.某人该做某事了。(从句谓语用过去式，有时也用“should+动词原形”)It’s first(second)time + that-从句.某人第几次干某事。(从句谓语用现在完成时)

It’s + 时间段 + since-从句.自从„„有一段时间了。

It’s + 时间段 + before-从句.过多长的时间才„„

三、it用作形式主语

1.基本用法

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。

如：

It’s very important to remember this.记住这一点很重要。

It’s hard work climbing mountains.爬山是费劲的事。

It’s unknown when he will come.他什么时候来还不知道。

2.用作形式主语的的重要句型

(1)It + be + adj.for(of)sb to do sth 某人做某事„„

It is hard for him to make up his mind.他很难下定决心。

It was foolish of her to say such a thing.她说那样的话，真是太蠢了。

【说明】介词 of 与 for 的区别是：of 用于指某人的性格、属性、特征等，介词for表示对象，意为“对„„来说”

(2)It takes sb + 时间段 + to do sth.某人做某事花了„„时间

It takes years to master a new language.要花多年的时间才能掌握一门新的语言。

【说明】此句型可以有以下多变种变体：It took me an hour to write the letter.=The letter took me an hour(to write).=I took an hour to write the letter.我写这封信花了一个小时。

(3)It is up to sb to do sth.该由某人做某事

It’s up to you to to make the choice.得由你来作选择。

(4)it look(seem, appear, happen, occur)that [as if]„ 似乎„„

It seemed as though he didn’t recognize me.他似乎没认出我来。

It happened that I was out when he called.他打电话时我碰巧不在家。

(5)It is(was)被强调部分+ that(who)+ 句子其他部分.此结构强调的成分仅限于主语,宾语和状语.It is from the sun that we get light and heat.It was not until I had read your letter that I understood the true state of affairs.典型例题

1）It was last night ___ I saw the comet(彗星).A.the time B.when C.that D.which

答案C.强调句的结构是：It +be +强调部分 + that(who)+ 主谓句.强调句的连词只有两个,that和who.当强调的部分是人,且为句子的主语时,才用 “who”,其余用that.原句：My father did the experiment in the lab yesterday evening.强调主语：It was my father who did the experiment in the lab yesterday evening.强调宾语：It was the experiment that my father did in the lab yesterday evening.强调时间：It was yesterday evening that my father did the experiment in the lab.(注意不用when)

强调地点：It was in the lab that my father did the experiment yesterday evening.四、it用作形式宾语

1.基本用法

当不定式、动名词、从句等复杂成分用作宾语且其后跟有宾语补足语时，通常会在宾语补足语前使用形式宾语，而将真正的宾语移至句末。其基本结构为“动词+it+宾语补足语+不定式(动名词或从句)”。

如：

I find it difficult to do the job well.我发现做好这件事不容易。

I think it best that you should stay here.我认为你最好住这儿。

We think it no use complaining.我们认为抱怨是没有用的。

2.用作形式宾语的几个特殊结构(1)动词+ it + that-从句。如：

I like it that you came.你来了，我很高兴。

I take it(that)he will come on time.我认为他会准时来的。

You can put it that it was arranged before.你可以说这是以前安排的。

【说明】能用于此结构的动词不多，常见的有take it for granted, bring it to sb’s attention, owe it to sb 等。It 的用法练习

一．单项选择。

1.Was it during the Second World War _____he died?

A.that

B.while

C.in which

D.then 2.Is ____ necessary to take off our shoes when we enter the lab?

A.everyone

B.this

C.her

D.it

3.Is ____ possible to fly to the moon in a spaceship?

A.now

B.that

C.it

D.man

4.I don’t think ___ possible to master a foreign language without much memory work.A.this

B.that

C.its

D.it

5.She heard of a terrible noise, ___ brought her heart into her mouth.A.it

B.which

C.this

D.that

6.Alice received an invitation from her boss, ____ came as a surprise.A.it

B.that

C.which

D.he

7.Does ____ matter if he can’t finish the job on time?

A.this

B.that

C.he

D.it

（补充定语从句中which还有一种特殊用法，它可以引导从句修饰前面的整个主句，代替主句所表示的整体概念或部分概念。在这种从句中，which可以作主语，也可以作宾语或表语，多数情况下意思是与and this 相似，例如：

He succeeded in the competition, which made his parents very happy.）

8.Tom’s mother kept telling him that he should work harder, but ____ didn’t help.A.he

B.which

C.she

D.it

9.The weather turned out to be very good, ___ was more than we could expect.A.what

B.which

C.that

D.it

10.____is a fact that English is being accepted as an international language.A.There

B.This

C.That

D.It

12.It was about 600 years ago___the first clock with a face and an hour hand was made.A.that

B.until

C.before

D.when

13.I hate ____ when people talk with their mouths full.A.it

B.that

C.these

D.them

14.It was only when I reread his poems recently____ I began to appreciate their beauty.A.until

B.that

C.then

D.so

15.It is the ability to do the job ____ matters not where you come from or what you are.A.one

B.that

C.what

D.it

16.It ____ you that ____ to blame.A.is;is

B.is;are

C.are;are

D.are;is

17.Was_____that I saw last night at the concert?

A.it you

B.not you

C.you

D.that you

18.____ electricity plays such an important part in our life?

A.Why is it that

B.Why is it

C.Why it is that

D.Why is that

19.It was ____ he said _____ disappointed me.A.what;what

B.that;that

C.what;that

D.that;what

20.It was in the lab ___ was taken charge of by Professor Harris ___ they did the experiment.A.which;that

B.that;what

C.whom;that

D.which;where

1-5ADCDB

6-10CDDBD

11-15DAABB

16-20BAACA

“it”的用法归纳 第2篇

一、用法代词

1.代替前文提到过的事物、也可代替人。如:

I bought a new book yesterday, but lost it this morning.

我昨天买了本新书, 但今天早上把它丢了。

Where is my penIt is on the desk.

我的钢笔在哪里它在桌子上。

The baby is sleeping.Don't wake it up.

婴儿在睡觉, 别吵醒他。

2.代替前边提到的句子或短语。如:

The old man understood Japanese, but we didn't know about it.

那位老人懂日语, 但我们以前不知道这一点。

The students don't know the works of the writer, but the teacher knows it.

学生们不知道那个作家的作品, 但老师知道。

3.指时间、季节、天气、环境状况、距离。如:

It's time for supper.

到晚饭的时间了。

It will be winter soon.

马上就是冬天了。

When spring comes.it gets warmer and warmer.

当春天来时, 天气变得越来越暖和。

It's always quiet here by night.

到了夜晚, 这里总是静悄悄的。

It's about two miles from here to the station.

从这里到车站大约有2里远。

4.用以代替指示代词this、that.如:

What's thisIt's a pen.

这是什么它是一支钢笔。

Whose book is thatIt's hers.

那是谁的书是她的。

二、用作引导词

1.用作形式主语、代替由不定式、动名词或从句表示的真正主语。如:

It's important to protect your skin from the harmful effects of the Sun.

保护肌肤免受太阳伤害是非常重要的。

It is no good reading without understanding.

读书不求甚解是无用的。

It is said that he joined army.

据说他当过兵。

2.用作形式宾语, 代替由不定式、动名词或从句表示的真正宾语。如:

I think it impossible for us to solve the problem.

我认为我们要解决那个问题是不可能的。

We thought it no use doing that.

我们认为那样做是没用的。

I believe it right that failure is the mother of success.

我相信失败是成功之母是对的。

三、用在强调结构中

“It is (was) +被强调成分+that (who) ”。如:

I saw Tom in the street this morning.

可以用来分别强调句中的主语、宾语、地点状语和时间状语。如:

It was I who saw Tom in the street this morning.

是我今天早晨在街上看到汤姆的。

It was Tom that I saw in the street this morning.

今天早晨我在街上看到的是汤姆。

It was in the street that (不用where) I saw Tom this morning.

我今天早晨是在街上看到汤姆的。

It was this morning that (不用when) I saw Tom in the street.

倒装句式用法归纳 第3篇

形相近,意不同——易混句式归纳 第4篇

1.

(1) As i s known t o ever ybody, t he moon t r avels r ound t he ear t h once ever y mont h.

(2) It is known t o everybody t hat t he moon t r avels r ound t he ear t h once ever y mont h.

(3) What is known t o everybody is t hat t he moon t r avels r ound t he ear t h once ever y mont h.

句 (1) 是as引导的非限制性定语从句;句 (2) 是It is+过去分词+t hat从句, 是主语从句;句 (3) 是主语从句+i s+表语从句, what既起连接作用又在从句中作主语。

2.

(1) The old man has t wo sons, bot h of whom ar e doct or s.

(2) The old man has t wo sons, and bot h of t hem ar e doct or s.

(3) The old man has t wo sons, bot h of t hem doct or s.

句 (1) 是非限制性定语从句;句 (2) 是and连接的两个并列分句;句 (3) 是独立主格结构。

3.

1) Is t hi s school t he one youvi si t ed last mont h?

(2) Is t his t he school you visit ed last mont h?

句 (1) 中, 定语从句修饰t he one, 省略了关系代词t hat.

句 (2) 中, 定语从句修饰t he school, 省略了关系代词t hat或which.

4.

(1) He i s one of t he st udent swho wer e pr ai sed by our t eacher f or helpi ng t he old last week.

(2) He is t he only one of t he st udent s who was pr ai sed by our t eacher f or helpi ng t he old last week.

句 (1) 中, 定语从句修饰先行词t he st udent s (复数) 。

句 (2) 中, 先行词前有t he only修饰, 故从句动词用单数。

5.

(1) It was at mi dni ght t hat hecame back.

(2) It was midnight when he came back.

句 (1) 是强调句式, 强调at midni ght.

句 (2) 是固定句式, It was+时间点+when:当某事发生时是时候。

6.

(1) It i s t hr ee year s si nce hesmoked.

(2) It is t hree years since he began t o smoke.

句 (1) 中, smoke是延续性动词, 意思是这个动作结束到现在多久了。此句意为他不吸烟三年了。

句 (2) 中, began t o smoke是这个动作开始到现在多久了。此句意为他吸烟三年了。

7.

1) It i s half a year si nce hej oi ned t he ar my.

(2) It will be half a year before he j oi ns t he ar my.

句 (1) 自从以来多久了。此句意为他参军半年了。

句 (2) 是过多久将会。此句意为再过半年, 他就要去参军了。

8.

(1) I don’t suppose anyone wi llbe volunt eer, wi ll t hey?

(2) Tom doesn’t suppose anyone wi ll be volunt eer, does he?

句 (1) 主语为第一人称, 陈述部分谓语是t hink, believe, suppose, guess, expect, i magi ne时, 反意疑问句与宾语从句保持一致。

句 (2) 主语是第三人称, 反意疑问句的主语和时态与陈述部分的主语、时态一致。

9.

(1) It i s t he f i r st t i me t hat hehas vi si t ed Par i s.

(2) The first t ime he visit ed Par i s, John was at t r act ed.

(3) He has visit ed Paris for t he f i r st t i me.

句 (1) 是固定句式“某人是第几次做某事”。

句 (2) t he first t ime做连词, 引导时间状语从句。

it句式的用法归纳 第5篇

在英语中,我们常用It is/was…who/that结构来突出强调句子的某一成分(一般是句子中主语,宾语或状语)。在这个句型中,it没有实在意义,只是引出被强调的成分。如果被强调的成分是表示人的词,用who或that来连接都可以。如果是其它成分,则一律用that来连接。例如:

It is my mother who/that cooks every day.

It was yesterday that Tom passed the maths exam.

二、使用本句型的几个注意事项

1. 被强调成分是主语,who/that之后的谓语动词应该在人称和数上与原句中的主语保持一致。例如:

It is I who am right. It is he who is wrong.

It is the students who are lovely.

2. 即使被强调成分是句子中的时间状语,地点状语,原因状语等,也不能用when, where because,而要用that。例如:

It was after the war was over that Einstein was able to come back to his research workagain.

It was in front of the bank that the old lady was robbed.

It was because of the heavy rain that he came late.

3. 如果被强调的成分有同位语,同位语也应提前。例如:

It was from him, his chemistry teacher, that Paul learned to watch carefully in class.

4. 被强调成分是作主语的代词,用主格,是作宾语的代词,用宾格。例如:

It was he that helped me yesterday.

It was me that he helped yesterday.

5. 被强调部分既包括人又包括物,用that不用who。例如:

lt was the things and people that they remembered that they were talking about.

三、考试中,为了增加试题难度,强调句型经常以疑问句形式出现。其一般疑问句形式是:

Is/Was it+被强调成分+who/that… 例如:

Is it Mr. Smith who teaches you English?

其特殊疑问句形式是:疑问词+is/was+it+that… 例如:

Why was it that you did not attend the meeting yesterday?

When was it that this traffic accident happen?

Where was it that you put my English dictionary?

四、区分其他从句和强调句型

某些从句和强调句型形式差不多,容易混淆。如果去掉it is/was…that,句子仍然通顺成立,则为强调句型,不成立不通顺,则为其他从句。例如:

It was…three years ago that he went to America for a further study.

去掉It was…that句子为Three years ago he went to America for a further study. 句子通顺,意思完整,那么,这就是一个强调句型所构成的句子。再如:

It’s a pity that you should have to leave.

名词单复数用法归纳 第6篇

如:

1. 主语:The bag is in the desk.

书包在桌子里边。

2. 宾语:I washed my clothes yesterday.

昨天我洗了我的衣服。

3. 表语:This is a good book.

这是一本好书。

4. 宾语补足语We selected him our monitor.

我们选他为我们的班长。

5. 介词宾语Mary lives with her parents.

玛丽和她的父母住在一起。

6. 定语:She is a Party member.

她是一位党员。

一、名词按其所表示的事物的性质分为分为可数名词(Countable Nouns) 和不可数名词 (Uncountable Nouns)

1.不可数名词是指不能以数目来计算,不可以分成个体的概念、状态、品质、感情或表示物质材料的东西;它一般没有复数形式,只有单数形式,它的前面不能用不定冠词a/an。抽象名词,物质名词和专有名词一般是不可数名词

2. 可数名词有单数和复数两种形式:

1) 一般情况下,在词尾加 -s。如:desk→desks

2) 以s,x,ch,sh结尾的词,在词尾加 -es。如:bus→buses

3) 以辅音字母加 -y结尾的词变y为i再加 -es。如:family→families,factory→factories

4) 以元音字母加 -y结尾的词在词尾加–s。如:day→days

5) 以f或fe结尾的词变f或fe为v再加 -es。如:knife→knives,

6) 以辅音字母加 -o结尾的词在词尾加es。如:potato→potatoes

7) 以元音字母加 -o结尾的词在词尾加–s。如:radio→radios

二、名词复数顺口溜

1. 表示国籍的名词顺口溜

(1)“中、日、瑞”友好是一致。(Chinese,Japanese,Swiss单复同形,即:Chinese,Japanese单复数同形 )

(2)“英、法”联盟a变e。

(3) 其他一律 加–s,(English,French,Swedish,Spanish,an Englishman--two Englishmen) 即:Englishman,Frenchman的复数为Englishmen,Frenchmen;其他像German、American、Australian等的复数形式是在后面加“s”。

2.o 结尾的名词顺口溜

1) 有生命的以o结尾的名词变复数时,词尾加 -es,凡无生命的以o结尾的名词变复数时,词尾加 -s。有生命:potato-potatoes, tomatotomatoes, hero-heroes, Negro--Negroes如无生命:zoo-zoos, radio-radios,photo-photos, piano-pianos, zero-zeros. 像volcano(火山)、tobacco(烟草)这些词,复数形式加 -s或 -es均可,这一点就不难理解了。

2) 两人两菜一火山。(-es) 中学课本中以o结尾的名词构成复数时,加es的只有Negro(黑人),hero(英雄),potato(土豆),tomato(西红杮),volcano(火山),这就是“两人两菜一火山”。或:黑人和英雄吃土豆和西红柿Negroes and heroes eat tomatoes and potatoes

3) 其余以o结尾的名词变复数时均加s。

图景:你在“zoo”里,看见一棵“bamboo”,上面挂着一张“photo”,所照的是一架“piano”,上面放着一台“radio”。zoo-zoos,bamboobamboos,photo-photos piano-pianos, radio-radios.

3.f,fe 结尾的顺口溜

1) 以f(e) 结尾的名词变为复数时,有的把f(e) 改为v(e) 再加s,其他的以“f(e)”结尾的名词则直接加“s”。“妻子持刀去宰狼,小偷吓得发了慌;躲在架后保己命,半片树叶遮目光: wife(妻子),knife(刀子),wolf(狼),thief(小偷),shelf(架子),life(生命),leaf(树叶),self(自己),half(一半)。”这9个名词变复数时,都要改“f(e)”为“ve”再加“s”。

2) 以f结尾的名词,一般把把f改为 -ves,但也有特殊情况是直接加-s的,如gulf, roof, chief, serf, belief, proof, handkerchief。编成口诀联想:海湾边、屋顶上,首领农仆相望:谁说他们无信仰,语气定在手帕上。

3) 不同人的单复数

中日瑞士不用变,英法国人A变E,其余S加后面

三、名词复数的不规则变化:

1.child→children(儿童) man→men(男人)

woman→women(女人) foot→feet(脚)

tooth→teeth(牙) mouse→mice(老鼠)

ox→oxen(公牛) goose→geese(鹅)

an Englishman→two Englishmen(英国人)

2. 单复同形

deer,sheep,fish,Chinese,Japanese,species,means,Swiss

除人民币,美元、英镑、法郎等都有复数形式。如:a dollar,two dollars; a meter,two meters

3. 集体名词,以单数形式出现,但实为复数。

people,police,cattle是复数 ( 正确:a person,a policeman,a head of cattle,the English,the British,the French,the Chinese,the Japanese,the Swiss )( 错误 :a people,a police,a cattle)

表示国民总称时,作复数用。如:The Chinese are industrious and brave. 中国人民是勤劳勇敢的。

4. 以 s 结尾,仍为单数的名词

1 maths,politics,physics等学科名词,为不可数名词,是单数。

2 news是不可数名词。

5. 表示由两部分构成的东西

glasses(眼镜) trousers(长裤) clothes(衣服),若表达具体数目,要借助数量词pair(对,双)a pair of glasses two pairs of trousers

6. 另外还有一些名词,其复数形式有时可表示特别意思

It的用法与表达 第7篇

1 作人称代词, 指代事物、动物、婴儿或未知的人

例如以下几句。

(1) Look at the baby, isn`t it lovely? (指代婴儿)

(2) Who is knocking at the door?

It`s me. (指代不明身份或性别的人, 一般不必译出)

(3) The ant is not gathering this food for itself alone.It has two stomachs in its body. (指代前面出现的事物)

2 作非人称代词, 表示天气、时间、距离、自然现象、环境等

例如以下几句。

(1) It is very cold today. (指代天气)

(2) It is seven o`clock.Mrs Tuner goes into the kitchen. (指代时间)

(3) It is twenty mils to the zoo. (指代距离)

(4) It is very quiet here. (指代环境)

(5) It was winter.It was ten degree below zero. (指代自然现象)

3 作关系代词

3.1 代替不定式, 作形式主语或形式宾语

在这种结构中, 被代替的成分要置于句末, 这样的句式可避免句子显得头重脚轻。例如以下几句。

(1) It is of great help to master a foreign language.

(2) It took me a week to rewrite the paper.

(3) I consider it advisable to tell her beforehand.

(4) We find it quite necessary to make some changes.

3.2 代替动名词

例如以下几句。

(1) It`s dangerous sleeping out in the woods at night.

(2) I find it a waster spending so much money drinking and eating.

(3) It is worthwhile making another try.

3.3 代替名词性从句

该结构中的名词性从句可用that, what, when等连接代词或连接副词引导。例如以下几句。

(1) It is obvious that metals in common use are very important in our life.

(2) It happened that she was not at home when I called.

(3) It is not known when caused the incident.

(4) It is a mystery when they got married.

4 使用“It is/was+被强调部分+that/who+其它”的形式构成强调句型

当it构成强调句型时, 既无指代关系也无实义, 去掉句型中“It is/wasthat/who”三个词后, 剩余的词仍能单独组成一个完整的句子, 此外翻译时要突出句子中被强调成分。

例如以下几句。

I met Bob in your room yesterday.

(1) It was yesterday that I met Bob in your room. (强调时间状语)

我就是昨天在你的房间遇见鲍勃的。

(2) It was in your room that I met Bob yesterday. (强调地点状语)

我就是在你的房间昨天遇见鲍勃的。

(3) It was Bob that I met in your room yesterday. (强调宾语)

昨天我在你房间遇见的就是鲍勃。

(4) It was I who met Bob in your room yesterday. (强调主语)

昨天在你房间遇见鲍勃的就是我。

5 使用it构成虚拟句型

考虑到主句中形容词的差异, that后面引导的从句中要用虚拟语气 (should+动词原形) , should可以省去, 这类形容词包括:important、necessary、right、strange、natural等等。例如以下几句。

(1) It is important that we (should) learn English well.

(2) It is necessary that we (should) remember these words.

此外主句中使用的过去分词若表示请求、建议、命令等词时, that后面引导的从句也要用虚拟语气 (should+动词原形) , should可以省, 常译为“据建议、有命令”等等, 这类过去分词包括:s u g g e s t e d、ordered、demanded、insisted、commanded等等, 例如以下几句。

(1) It is suggested that the meeting (should) be put off.

(2) It was ordered that we (should) arrive there in three hours.

6 用it组成的惯用语

It同动词组合可以组成惯用词组, 这种情况下, it的用法无明确指代关系, 也无明确含义。例如以下几句。

(1) Take it easy.

(2) We had a nice time of it.我们玩得很好。

(3) Win or lose, we`ll stick it out (坚持到底) .

(4) Go it (加油) !We`ll back you up.

再如:call it a day (今天就干到这里, 到此为止) 。

make it (做到, 办成) 。

go it alone (独自干) 。

rough it (生活困顿, 艰难地生活) 。

hit it (猜对, 说中) 。

beat it (走开, 滚开) 。

come it (达到目的, 成功地做) 。

brave it out (拼着干到底) 。

face it out (把坚持到底, 挺到底) 。

foot/walk it (步行) 。

just for the hell of it (只是为了好玩) 。

as luck would have it (碰巧, 不凑巧, 倒霉) 。

take it out of somebody. (拿出气) 等等。

7 构成have it that结构, 其含义为“说”

例如以下几句。

(1) The newspaper has it that (声称) the president will resign.

(2) Legend has it that there is a dragon in the lake.

据传说, 这个湖里有一条龙。

(3) Rumour has it that he has escaped into the forest.

据谣传, 他逃到森林里去了。

8 构成for it结构, 其含义可以表示“应付的手段和方法、因此、受罚”等。

例如以下几句。

(1) There`s nothing for it but to wait. (办法)

(2) She will be in for it. (倒霉、受罚)

(3) It is none the better for it. (因此)