一 it/one/that均可作代词，代指前面提到的名词
代替泛指的单数名词通常用one.如
Two heads are better than one.
I lost my old camera;this a new one
注：若one前没有形容词修饰则不能用不定冠词,但可以用another
I'm looking for a flat.I'd like a small one with a garden.
I'm looking for a flat.I'd like one with a garden.
This pen doesn't work.I must buy another one.
注意one与it的区别：
Can you lend me a pen? Sorry,I haven't got one.
Can I borrow your pen? Sorry,I'm using it？
二 it/that/the one代替表特指的单数名词
1.代替单数可数名词三者均可，代替不可数名词是不能用the one
而用it/that。表同一事物用it,表同类事物用that/the one如：The weather here is too cold.I don't like it.
The weather of Beijing is colder than that of Guangzhou.
My uncle bought me a dictionary and I like it.
Your dictionary is more useful than the one my uncle gave me.
2.代替事物三者均可，代替人时只用the one
Who is her husband? The one by the window.
注：替代性别不明的婴儿时用it
3.当有前置修饰语时只能用the one
Which do you wang？The red one.
She would rather have the small one than the large one.
4.当有后置修饰语时，通常用the one 如：
My room is better than the one next door.
Is that the one that was published recently?
但是后置定语为of引起的介词短语，通常用that.
The populatoon of China is much larger than that of Japan.
A grandparent's job is easier than that of a parent.
one/that虽可用来指代同名异物，但one为泛指，相当于a/an 名词；that为特指，相当于the 名词，所以one指代的名词修饰语一般为
a/an/some/any.
that指代的名词修饰语往往是the/this/that.
A chair made of steel is stronger than one made of wood.
(该句中one可换成a chair)
The water in the cup is hotter than that in the pot.
(该句that可换成the water)
三代替泛指的复数名词
代替表泛指的复数名词，通常用ones.如
Hard beds are healthier than soft ones.
Green apples often taste better than red one.
These chairs have the great advantage of being much cheaper than conventional ones.
四代替表特指的复数名词通常用the ones
I'd like to try on those shoes.The ones at the front of the window.
Are they the ones who moved here recently?
Don't buy the expensive apples;get the cheaper ones.
注:口语中也可用those来代替特指的复数名词，尤其是当其后有of引导的介词短语或who引导的定语从句修饰时。如：
Waves of red light are about twice as long as those of blue light. Those of you who wish to go on the trip may sign up here.
His ideas are different from those of his friends.
Students who do well in examinations are those(the ones)who ask questoins in class.
五几点重要的补充说明
1 当替代词one/ones紧跟在形容词最高级，序数词以及
this/that/these/those/which/either/neither/another等限定词之后时通常可以省略。如：
I think my dog's the faster(one)
Either (one) will suit me.
Let's have another (one)
She looked at each (one) carefully before she close.
Which (one) would you like? That (one) looks the nicest.
2 复数形式的ones之前一般不能直接用名词所有格，物主代词,数词以及
some/any/both/several/dozen/own等词修饰。如：
Have you got any drawing-pins? Can I borrow some please?(不能说some ones)
Do you have any new diaries? We don't have any at the moment.(不能说any ones)
Do questions1 or question2,but not both .(不能说both ones)
He has three dictionaries and I have only two.
注：如果ones前有描绘性形容词修饰，则可使用上述词语。如：
误：her ones/some ones/five ones/your own ones
正：her red ones/some new ones/five bad ones/your own nice ones
在美国英语中ones不能紧跟在these/those之后，但在英国英语中可以这样用（但不常见）
3当一个名词受另一个名词修饰时，通常不宜用one(s)来替代。如：
Do you need coffee cups or tea cups?(不能说tea ones)
但若一个名词受表材料的名词修饰时，可用one(s)替代
We can lend you plastic chairs or metal ones.
one只能替代可数名词单数，替代可数名词用复数用ones。that既可以替代可数名词单数又可以替代不可数名词，代替可数名词复数用those.
高中英语语法：It的完整用法精讲 it可用作人称代词、指示代词、先行词及引导词等。 1. 人称代词it，是第三人称单数中性，代表前文已提到过的一件事物。如： 1）That vase is valuable. It's more than 200 years old. 那个花瓶很珍贵，它有200多年的历史。 2）I love swimming. It keeps me fit. 我喜欢游泳，它能使我保持健康。 当说话者不清楚或无必要知道说话对象的性别时，也可用it来表示。如： 3）It's a lovely baby. Is it a boy or a girl? 宝宝真可爱，是男孩还是女孩？ it可用来指代团体。如： 4）The committee has met and it has rejected the proposal. 委员会已开过会，拒绝了这项建议。 it用以代替指示代词this, that.如： 5）--- What's this? --- It's a pen. —这是什么？—是一支钢笔。 6）--- Whose book is that? --- It's Mike's. —那是谁的书？—是迈克的。 2. 指示代词it，常用以指人。如： 7）Go and see who it is. 去看看是谁。 8）--- Who is making such a noise? —是谁发出这样的吵闹声？ --- It must be the children. —一定是孩子们。 3.虚义it无指代性，常用作没有具体意义的主语，出现于表示天气、气候、温度、时间、地点、距离等意义的句子中。如： 9）It is half past three now. 现在是三点半钟。 10）It is six miles to the nearest hospital from here. 这里离最近的医院也有六英里。 11）It was very cold; it snowed and grew dark. 天气很冷；天下着雪，渐渐地变黑了。 it也常用来表示一般的笼统的情况。如： 12）It's awful—I've got so much work I don't know where to start. 糟透了——我有这么多工作要做我不知从何开始。 13）How is it going with you? 你近况如何？ 14）Take it easy. 不要紧张。 it也常用于下列结构： 15）It looks as if the college is very small. 看起来这个学院很小。 16）It seems as though our plan will be perfect. 似乎我们的计划很完善。 17）It's my turn. 该轮到我了。 it也常用于某些习惯用语中作宾语，各该习惯用语有具体意义，但it并无具体意义。如：cab it 乘车catch it 受责，受罚come it 尽自己分内come it strong 做得过分walk it 步行make it 办成take it out of somebody 拿某人出气 4. 先行词it. it充当形式主语或形式宾语，本身无意义，只起一种先行引导的作用，先行词不重读。后面的真正主语或真正宾语通常是不定式结构、-ing分词结构或名词性从句。 （1）用作形式主语
高三英语第一轮复习：代词it的用法冀教版 【本讲教育信息】 一. 教学内容： 代词it的用法 二. 教学重点： （一） it的用法主要体现在以下几个方面：作为人称代词的it，先行代词的it，非人称代词的it以及强调句中的it和it的一些习惯用法。 1. it指代事物、群体、经验、活动等。可以代替一个词、词组或整个句子，以免重复。 That wasn’t where you had dinner，was it？ If you remember these points，it will help you. When can we come to visit you？Any time you feel like it. I love running. It keeps me fit. it也可指代婴孩或性别不详的人。 Do you hear a baby crying？Something must have hurt it. Who is making so much noise？It must be the children. Somebody is knocking at the door. I don’t know who it is. Who is it? 未见具体人，不同于Who is that ？见到具体某人，但不相识。 2. it用作非人称代词的主语，表示气候、天气、温度、时间、地点、距离等或虚指的情境。 It’s Sunday tomorrow. It’s five miles to the nearest station from here. It was dull when Tom was away. It seems that no one would like to help you. Had it not been for my illness last week，I would have gone with them. 3. it常用作先行代词 代指不定式，可用作形式主语或形式宾语，以it作形式主语或形式宾语的动词有believe，consider，feel，find，imagine，make，regard，suppose，think等。 It is difficult to learn written Chinese. It is of great help to master a foreign language. It took me a week to recite the text. I find it quite necessary to make some changes. He thought it best to be on his guard. 代指动名词，可作形式主语或形式宾语，常用在下列句型中 It is no good（no use，useless）＋动名词 It is a waste＋动名词 代指名词性从句，该结构中的名词性从句可用that，when，who等引导。 It happened that they were away. She wants to make it clear whether you still love her or not. It is not known what caused the accident. Has it been found out who is the murderer？ It is believed／known／reported／said／supposed／thought that an egg is the equivalent of one pound of meat. 可转换为An egg is believed／known／reported／
?Never be afraid of grammar ?Collect some examples; ?Watch them very carefully; ?Find out something in common; ?Try to use the rules ---- practise. 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的用法及练习 一、概述 在英语中，it的使用相当广泛，它既可用作代词，如人称代词（personal it）、指示代词（demonstrative it）及非人称代词（impersonal it）, 也可用作引导词（anticipatory it）和强调结构中的强调词（emphatic it） Someone is ringing the doorbell. Go and see who it is.有人在按门铃。去看看是谁。（人称代词）What’s this?这是什么？ It’s a book.这是一本书。（指示代词） What a long way it is from Beijing to London! 从北京到伦敦真远。（非人称代词） It's best to plant trees in spring because it's warmer.春天是植树的最佳时节，因为天气更暖和。（作引导词） It was I who met him in the park last week. 是我上星期在公园遇到他的。（强调结构中的强调词） 二、it作代词 1、用作人称代词（personal it） 代替前文提到过的事物，it作真实主语或宾语。 The frog is not a warm-blooded animal. It is a cold-blooded one.青蛙不是温血动物，它是冷血动物。My pen is missing. I can't find it anywhere. 我的笔丢了，我哪儿也找不到它了。 I won't be back tonight. Please tell my wife about it .我今晚不回来了，请你向我妻子说一声。 I was disappointed with the film. I had expected it to be much better. 我对这部电影很失望，我曾盼望它更好。 Tom's mother kept telling him that he should work harder, but it didn't help.汤姆的妈妈不停地告诉他要努力，但这没起作用。 2、用作指示代词（demonstrative it） 相当于this或that，it有时不特指某件东西，而代表前面已提到的或将会发生的某件事情。 -Who is knocking at the door? —谁在敲门？
代词one,it,that的用法区别 代词one, it that的用法在历届高考题中出现的频率较高，是高考的热点之一。 1）one, it, that常常用来代替或避免重复某个名词。例如： ①I'm looking for a flat. I'd really like one with a garden. ②-Where did you find your watch? - I find it in our classroom. ③The population of China is larger than that of any other country. 2）one可指人或物，只替代单数可数名词，复数用ones. One是泛指，但有限定修饰语，如the, this, that…修饰就变成了特指。如： ①One must do one's duty. ②Mary has a red pencil and Jane has a blue one. ③The new designs are much better than the old ones. 3）.that只指物，不指人，可替代可数名词或不可数名词，具有“特指”性质。指的是同类事物中的另一样东西，即同类异物。如：The library of our school is bigger than that of yours.(that 代替的是另一个图书馆。) 4）one 和that 在代替可数名词时，如果没有前置定语只有后置定语时，the one 和that 可互换。但该名词如有前置定语，则只能用the one,而不能用that。例如： ①I will take the seat next to the one(=that)by the window.我就坐窗口的那个座位旁边。 ②I prefer the large box to the small one.(one 不可用that替换)。 5）That的复数形式those代替可数名词的复数。可指人或物，一般后面跟修饰语。如： ①Today's cellphones are smaller than those(=the ones)used in the past. ②The students who do best in exam are not always those(=the ones) with the best brains. 6）the one(ones)或that ,those 指代某一名词做定语从句的先行词时，其关系代词which在that之后，which不能省略，而在the one、ones 之后,which可省略。如： ①Their problem today is somewhat similar to that which they faced many years ago. 7）代替不可数名词时，应该用that。如：The equipment is different from that. 8）it代替上文所提到的名词时，是指同类事物中的同一样东西，即同类事物。如： I have lost my pen. I'm looking for it. 9）it和that可代替前面整个句子的意思，而one却不能；that可引导一个限定性定语从句，代替某个先行词（单复数名词均可），it和one则不能；it可代替不定式、动名词或从句，用作形式主语或形式宾语，也可用于强调句型中，而one和that则不能。如： ①-I will make bed for you. –It is very kind of you. ②Jim said he had read my novel.But that was not possible. ③A clock is an instrument that tells time. ④The students that surf the Internet will be punished by the teacher. ⑤It is nice to see you again. ⑥It is no use calling her up. ⑦I found it impossible for me to pass the test. ⑧It was I who broke your window.
关于it作人称代词的用法: 1. 用于指事物 it用作人称代词最基本的用法就是代替前面已提到过的事物，以避免重复： This is my watch, it’s a Swiss one. 这是我的手表，它是瑞士制的。 I cannot find my watch; I must have lost it. 我找不到手表，我一定把它给丢了。 2. 用于指动物或婴儿 除用于指代事物外，还可指动物或性别不详的婴儿： “Where is the cat?” “It’s under the bed.” “猫在哪儿?”“在床下。” They got a baby and it was very lovely. 他们生了个孩子，很可爱。 3. 用于上文提到的情况 He smokes in bed and I don’t like it. 他在床上抽烟，我不喜欢他这样。 Her mother kept telling her not to go out at night, but it didn’t help. 她母亲老叫她晚上不要出去，但是没用。 4. 用于指人 it用于指人主要用确定未知人的身份： “Who is it?” “It’s me.” “是谁啊?”“是我。” “Listen. Someone is crying.” “Oh, it must be Mary.” “听，有人在哭。”“噢，一定是玛丽。” Someone must have been here. But we have no idea who it was. 一定有人来过，但我们不知道是谁。 5. 指人时与he和she的区别 当it用于指人时，主要用于确定未知的或者是身份不明的人，若是指已知的或身份明确的人，则应根据情况使用he或she。比较： I hear a knock at the door. It must be the postman. 我听见有人在敲门，一定是邮递员来了。 Jim is at the door. He wants to see you. 吉姆在门口，他想见你。 A tall man stood up and shook hands with her. It was the general manager. 一个高个子站起来同她握了手，他是总经理。
it作形式主语和形式宾语 it既可作人称代词，用来表示动物或无生命的物体等，也可以作无人称代词，在句中作主语，表示“时间”、“距离”、“天气”等。它还可以引导强调句，使语气得以加强。此外，it在句中能作引导词，充当句子中的形式上的成分，如形式主语、形式宾语等。 ㈠it作形式主语：it作形式主语时没有具体的意义，而只是帮助把真正的主语移到句子后部去，使句子显得平稳一些。it作形式主语时，可以代替三种形式：不定式、动名词和主语从句。 1. it代替不定式短语常用于下列句型中： It + be +形容词+ (for/of sb.) to do sth. It + be + 名词+ to do sth. It takes sb. some time to do sth. 干…花了某人…时间 It’s up to sb. to do sth. 干…是某人的职责或义务 如：①It is everyone’s duty to obey the law.遵守法律是每个人的义务。 （it作形式主语, 代替不定式短语to obey the law） ②It is difficult for a foreigner to learn Chinese.对于一个外国人来说，学习汉语是困难的。 （it作形式主语, 代替不定式短语to learn Chinese） ③It is not right to use these places as rubbish dumps.把这些地方用来倒垃圾是不对的。 （it作形式主语, 代替不定式短语to use these places as rubbish dumps） ④It took them a year to build the bridge.建这座桥花了他们一年的时间。 （it作形式主语, 代替不定式短语to build the bridge） ⑤It is bad manners to stare at people.瞪着眼睛看人是不礼貌的。 （it作形式主语, 代替不定式短语to stare at people） ⑥It is up to us to help those in need.帮助那些有困难的人是我们的责任。 （it作形式主语, 代替不定式短语to help those in need） ⑦It is not up to you to tell me how to do my job.我怎样干我的工作不用你来多嘴。 （it作形式主语, 代替不定式短语to tell me how to do my job） ◆ It be + 形容词+ for sb. to do sth.与It be + 形容词+of sb. to do sth.： 如果句型中的形容词描述的是sb.的品质、品格，在逻辑上可以作sb.的表语，则sb.前应用介词of，否则就用for。如：①It’s n ecessary for us to use a short-wave radio to pick up the programmes.我们用一台短波收音机收听这些节目是必要的。
小学英语语法：代词it的用法（一）以下是整理的“小学英语语法：代词it的用法（一）”内容，供大家参考学习，希望大家可以仔细阅读，若想了解更多“小学英语语法”的相关内容，可以关注，小编会持续为大家更新。 人称代词it 作人称代词的it可以指代事物，也可以指代人，在句中通常作主语或宾语。 （1）指上文提到的事物、动物、植物等。例如： That vase is valuable. It’s more than 200 years old. 那只花瓶很宝贵，它有200多年的历史。 Water is very useful. We use it to generate electricity. 水非常有用。我们用它来发电。 The company was losing money and it had to make people Redundant 公司正在亏损，不得不裁减冗员。 The man went up to the cat and started stroking it. 那人走到猫跟前，开始抚摸它。 （2）指前面的短语、从句或句子的内容。例如： I’d like to go on a trip to Europe, but I cannot afford it. 我想去欧洲旅游，但我却负担不起费用。 Railroad service was suspended. They told me it was because of a landslide.
铁路不通了。他们告诉我是因为山体滑坡。She was frightened, but tried not to show it. 她吓坏了，但她尽量不表现出来。 （3）在性别不计或不明时指人或婴孩。例如：What a lovely baby! Is it a boy or a girl? 多可爱的宝宝！是男孩还是女孩？—There’s someone here to see you. 这儿有个人要见你。 —Who is it? 谁呀？
代词及It用法 代词是代替名词的词，英语中代词有人称代词、物主代词、反身代词、相互代词、指示代词、不定代词、疑问代词、连接代词和关系代词等九种。 一、人称代词： (一)概述 表示“我(们)”、“你(们)”、“他/她/它(们)”等的词叫人称代词，它有人称、数和格的变化，其形式列 (二)人称代词的句法功能： 人称代词在句中的功能是通过“格”表现出来的，不同的格表明人称代词在句中有不同的句法功能。如： 1、主格形式作主语和表语。 He was late yesterday.昨天他迟到了。 They went to the cinema together.他们一起去看电影去了。 She and I are very good friends.我和她是很要好的朋友。 ---Is that Mr. Smith? 是史密斯先生吗？ ---Yes, this is he.(电话用语) 是的。 It might have been she.那或许是她。 【注】①在非正式英语，尤其是口语中，人称代词作be的表语时，通常可用其宾格形式代替主格。如：---Who is it? 谁呀？ ---It’s me.是我。 ②to be + 人称代词作主语的补足语时，人称代词用主格，作宾语的补足语时用宾格。如： I was thought to be she.人们认为我是她。= They thought me to be her. 2、宾格形式作宾语(动词的宾语或介词的宾语)。 I bought a present for them. = I bought them a present.我给他们买了件礼物。 Mind you, this is just you and me.听着，这事只能你知我知，绝不可外传。 3、在比较状语从句中，在不引起误解的前提下，有时用宾格代替主格(尤其其后有同位语“all”时)。 He is taller than I (或me).他比我高。 He is taller than us all.他比我们都高。 【注】若可能引起误解，就不能用宾格代替主格。如： He loves you more than I.他爱你胜过我爱你。 He loves you mare than me.他爱你胜过爱我。 4、用来表示感叹时，常用宾格形式。 Dear me! 哎呀/天哪! = Goodness me! (三)代词排列次序(1—每一人称；2—第二人称；3—第三人称) 1、单数：通常按2,3,1或是3,2,1人称排列。如： Mary and I are classmates. You, he and I are good friends. 2、复数：通常按1,2,3人称排列。如： We, you and they have been invited to the party. Both we and they happened to be there. 3、第三人称男女两性并用时，男先女后。如： He and she still don’t quite agree to this plan.
初中英语语法：it用作人称代词的用法 it用作人称代词的用法 1. 用于指事物 it用作人称代词最基本的用法就是代替前面已提到过的事物，以 避免重复： This is my watch, it’s a Swiss one. 这是我的手表，它是瑞 士制的。 I cannot find my watch; I must have lost it. 我找不到手表，我一定把它给丢了。 2. 用于指动物或婴儿 除用于指代事物外，还可指动物或性别不详的婴儿： “Where is the cat?” “It’s under the bed.” “ 猫在哪儿?”“在床下。” They got a baby and it was very lovely. 他们生了个孩子， 很可爱。 3. 用于上文提到的情况 He smokes in bed and I don’t like it. 他在床上抽烟，我不 喜欢他这样。 Her mother kept telling her not to go out at night, but it didn’t hel p. 她母亲老叫她晚上不要出去，但是没用。 4. 用于指人 it用于指人主要用确定未知人的身份： “Who is it?” “It’s me.” “是谁啊?”“是我。”
“Listen. Someone is crying.” “Oh, it must be Mary.” “听，有人在哭。”“噢，一定是玛丽。” Someone must have been here. But we have no idea who it was. 一定有人来过，但我们不知道是谁。 5. 指人时与he和she的区别 当it用于指人时，主要用于确定未知的或者是身份不明的人，若 是指已知的或身份明确的人，则应根据情况使用he或she。比较： I hear a knock at the door. It must be the postman. 我听 见有人在敲门，一定是邮递员来了。 Jim is at the door. He wants to see you. 吉姆在门口，他想 见你。 A tall man stood up and shook hands with her. It was the general manager. 一个高个子站起来同她握了手，他是总经理。 The general manager just called. He told us to wait for him at the gate. 总经理刚来过电话，他叫我们在门口等他。 6. 指物时与one的区别 两者均可代替前面提到的事物，区别是：it指的是与前面已提到 的事物为同一物，此时的it等于“the (this, that, my...)+名词”;而one 指的是与前面已提到的事物为同一类物，此时的one等于“a+ 名词”。比较： I have a dictionary but I’ve lent it to Mary. 我有一本词典，但把它借给玛丽了。 I haven’t a dictionary; can you lend me one? 我没有词典，你能借我一本吗?
I t的用法总结文档编制序号：[KKIDT-LLE0828-LLETD298-POI08]
It 的用法总结 一. 代词: 1)指代上文 2)指代this/that 3)指代未知性别的婴儿或孩子或身份不明的人 4）指代时间/地点/天气/温度/距离/环境 gets dark very early in the winter. will you call it if it’s a boy love spring---It’s a wonderful time of the year. ’s less than 100 kilometres from here to Jinan. the factory closes, it will mean 500 people losing their jobs. ’s this It’s a cat. has snowed much this year. (1)The book in your bag is very interesting. Can I borrow (2) The book in your bag is more interesting than ______ on the desk. (3) The weather here is much colder than____ in Nanjing. (4) The books are free. You can take____ free of charge. (5) The books in the bag are better than _____ on the desk.
C-代词it的基本用法 知识梳理 代词it 一.it用做人称代词的用法 it用作代词，意为“它”，既可以指人，也可以指物。it做人称代词，可以用来代替一个名词、短语、从句或句子，以避免他们在句中的重复。这是可以指提到过的，也可以指未提到的，在句中做主语、表语和宾语。 1)指事物，it可以指除人以外的任何事物或动物。 I dropped my watch and it broke.我把手表掉在地上摔坏了。 2)指人，it主用用于指性别不明的婴儿或只听其声不见其人的人，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. “Listen. Someone is crying.” “Oh, it must be Mary.” 3）代替某些代词。 代词it可以用于代替指示代词this, that以及复合不定代词something, anyth ing, nothing等，如： “What’s this?” “It’s a new machine.” 二.it用作非人称代词的用法 1)it用作非人称代词用来指时间、距离、价值、天气、气温及温度等。如 It’s too late to go there now.现在去那已经太迟了。 It rained all day yesterday.昨天下了一整天雨。 2)用于某些句型。 It’s time for sth. 该做某事了。 It’s time to do sth. 是时候该做某事了。 It’s time for sb to do sth. 某人该干某事了。
代词it, one, that和those用法说明 为了避免重复出现前面已经出现的名词，常用it, one, that, those来替代。这几个替代词是高考中的一个常考点。现将各个替代词的用法归纳如下： 用法说明一： it和that都替代“the+单数名词(可数或不可数)”，都是特指，都可替代可数和不可数名词，但it指前面提到的“同一”事物，而that是指前面提到的“同类”事物。如：My father bought me a pen and I like it very much. 我父亲给我买了一支钢笔，我非常喜欢它。(it替代the pen，指前面提到的父亲给我买的那支钢笔) This dictionary is more useful than that (=the one)I bought yesterday. 这本词典比我昨天买的更有用。(that替代the dictionary，与前面的this dictionary是同类) 用法说明二： one替代“a＋单数可数名词”，表示泛指；其复数形式ones替代泛指的复数名词。特指的the one相当于that，替代“the+单数名词”；the one的复数形式the ones，替代“the+复数名词”，在口语中也常用those代替。当后面有of短语时，多用that或those；当有前置修饰语时，只能用one(s)。另外，one(s), the one(s), those都只能替代可数名词。如： Radios are useful for me to learn English. I’d like to buy one .收音机对我学英语很有用，我想买一台。(one替代a radio，是泛指收音机这类东西中的一台) We still have shortcomings，and they are very big ones too. 我们还有缺点，而且是很大的缺点。(ones替代shortcomings) We kept seats for those who might arrive late. 我们给可能来晚的人留了座位。(those=the ones替代the persons) Waves of red light are about twice as long as those of blue light. 红色光线的波长约为蓝色波长的两倍。(those替代the waves) The population of Scotland was eight times as large as that of Cornwall. 苏格兰的人口是康沃尔人口的八倍。(that替代不可数名词the population，不能用the one) Correct the mistakes in the following sentences: 1. --- Do you haven’t an English-Chinese dictionary? --- Yes, I have it. 2. The language used in advertisements differs from one used in ordinary readings. 3. The colour of his jacket is better than mine. 4. --- Does she have a bike? --- Yes, she has a one. 5. --- I saw only one motorcar in that shop. Will you go and buy one? --- No, I would rather find it in other shops. Keys: 1 it--- one 2 one --- that 3 mine--- that of mine 4 删a 5 one--- it Multiple choice 1. --- There must be a dozen pens in the house but I can never find _______ when I need ______. --- Keep looking. ______ is sure to turn up. A. one; one; One B. it; one; It C. one; it; This D. a one; one; The one 2. --- Can I help you? --- I’d like to buy a present for my father’s birthday, _______ at a proper price, but of great use. A. that B. one C. any one D. the one 3. Maybe it is true that we do not know what we have got until we lose ______ . A. one B. that C. it D. the one 4. The environment in this faraway town is as pleasant as ________ in the coastal city. A. one B. it C. them D. that 5. The best job is _______ which uses your skill in doing something together with your interest in the subject. A. that B. the one C. one D. it 6. --- What do you think of the furniture on exhibition? --- W ell, great! But I don’t think much of ________ you bought. A. the one B. it C. that D. which 7. A cake made of wheat costs less than ________ made of rice. A. one B. that C. a one D. the one 8. As they are retired, they prefer to buy a house in the country to spend their late years to _____ in a large city. A. one B. that C. the one D. it Keys: 1 --- 8 ABCDCCAA it,one,ones,that,those的区别用法 为使表达简洁明了，我们常用it，one，ones，that，those 等替代词来替代前面 已经出现的名词。从近几年的高考英语情况来看，考查替代词的用法和区别一直是一 个热点。本文拟就以上几个最重要的替代词的用法作一小结，同时为同学们归纳一些
一，指代it 1.用来指代上文提到的事物。 ----Pass me your note. ----- Here it is . Whatever you do and say, ask yourself whether it is welcomed by others. The Olympic Game will be held in Beijing in 2008. It makes the Chinese proud. The news that they failed their driving test upset him, ________? A. did they B. didn’t they C . did it D. didn’t it -Why don’t we have a little break? -Didn’t we just have________? A. it B. that C. one D. this Few pleasures can equal to________ of a cool drink on a hot day. A. some B. any C. that D. those 特别注意：it, one和that作替代词的用法及区别 it代替前面提到的同一事物,该事物既可以是可数名词也可以是不可数名词。 one代替前面提到的同类事物中的一个。该事物只能是可数名词,前面可以有冠词,也可以被this、that或形容词修饰,其后也可以有定语 that代替前面提到的同类事物中特指的一个。该事物既可以是可数名词也可以是不可数名词,要有后置定语,但不可以有前置修饰语。 2. 表示时间，天气，距离，温度等。 3. 、作为人称代词，it可以用来指东西、动物、婴儿和未确定身份的人。 It’s lovely It’s a large sum of money It weighs only 3 kilos. 4.用来泛泛的指某件事： 1.It doesn’t matter. 2.It is a shame, isn’t it? 3.So you are going to be married this time？When is it？ 二：形式主语 1. It is necessary to be prepared for a job interview. Having the answers ready will be of great help. 2. The Foreign Minister said, “It is our hope that the two sides will work towards peace.” 3. It is known to everybody that the moon travels round the earth once every month. It is / was + adj. necessary/possible/important + ( for sb. ) to do sth. / clause It +is /was + n. (one’s duty /one’s hope/ an honour) + clause /( for sb. ) to do sth. It is / was p.p.(said/believed /known) + that-clause 1. It is +adj. +( of sb. ) to do sth. 主句中的形容词必须是能表示人的特征的形容词。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 +adj.+ to do sth. 。 It is kind of you to say so. = You are kind to say so. 2. It is +adj.+ ( for sb. ) to do sth. 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：important，necessary，natural easy ，safe ，common ，normal ，