It 用法
英语高考试题 如：
John’s success has nothing to do with good luck. It’s years of hard work has made him what he is today.(20xx湖南卷)
It is difficult for us to learn a lesson in life until we’ve actually had that lesson.(20xx天津卷)
常考用法：
1. 指代时间、日期、距离、天气等。
It’s ten past six. (指时间)
It’s warm at the moment. (指天气)
It’s two miles to the beach. (指距离)
2. 指代前面提到过的事物和谈话双方都明白的事情。
--- There is still a copy of the book in the library. Will you go and borrow it? （指代a copy of the book）
--- No, I’d rather buy one in the bookstore.(20xx陕西卷)
3. 用于强调句型：It is + 被强调部分 + that + 其他（当被强调部分是人时也可以用who）。此句型用于强调除谓语之外的任何成分。
It was not until he came back from Africa that year that he met the girl he would like to marry. (强调not until时间状语从句)(20xx江西卷)
--- I’ve read another book this week.
--- Well, maybe it is not how much you read but what you read that counts. (强调由not… but 连接的两个主语)(20xx浙江卷)
4. it用作形式主语，真正的主语是不定式、-ing形式和that从句。
其句型为：It is + 形容词、名词、过去分词 + to do sth. \ doing sth. \ that clause.
The doctor thought it would be good for you to have a holiday.(20xx全国卷) It is no use arguing with a person like him.
It is reported that the earthquake has killed 20,000 people in Japan.
5. it 用作形式宾语，可以带形式宾语的词有：think, believe, feel, make, find, imagine, consider等。
The fact that she was foreign made it difficult for her to get a job in that country.(20xx辽宁卷)
We have made it clear that we are strongly against smoking in the office.
6. 用于一些特殊句型中：
7. (1). It is(was) the first (last, second, third …) time that sb. has (had) done sth. 表示这是某人第几次做某事
It’s the first time that he has been to Australia, isn’t it? (20xx辽宁卷)
(2). It is (has been ) 一段时间 since sb. did sth. 表示since从句中的动作或状态结束时到现在的时间，也就是说延续性动词表示否定意义，瞬间动词表示肯定意义。
It is three years since I was a teacher. 表示我不当老师有三年了。
It is three years since I began to be a teacher. 表示我当老师有三年了。
(3) It will (not) be 一段时间 before … 表示”还要多久……才……(不久……就……)”
John thinks it won’t be long before he is ready for his new job.(20xx陕西卷)
7. 用于一些固定结构中：
If I can help it, I don’t like working late into the night.
如果我有办法的话，我也不想工作到深夜。(20xx全国Ⅱ卷)
I’d appreciate it if you would like to teach me how to use the comprter. 如果你愿意教我如何使用电脑我将不胜感激。(20xx山东卷)
I like it when you do that. 我喜欢你那样做。
When it comes to getting things done, he’s useless.
一涉及到做事，他便不中用了。
As someone puts it, practise makes perfect. 正如某人所说的，熟能生巧。 Can you see to it that the fax goes this afternoon?
你保证今天下午就把传真发出去，行吗？
Depend on it that we won’t give up. 请相信，我们决不会放弃。
第二篇：it用法小结
1.
“it”用法小结
“it”这个单词看起来虽然很简单，但是其用法很重要也很复杂。现“it”将用法做以小结，供大家参考。
一 用作人称代词
1通常指人以外的生物和事物。
E.g. ---Have you seen my pen? -----你看见我的钢笔了吗？
---Yes. It is on my desk.. -----看见了，他在我的课桌上。
2有时可用来代指婴孩。
E.g. A baby can’t walk or talk. It should be taken good care by its parents.
婴孩不会走路也不会说话，必须由父母照看好。
二．用作指示代词
1 相当于this或that.
E.g. ---What’s this? ---这是什么？
---It’s a book. ---它是一本书。
---Whose exercise book is that? 那是谁的练习本？
---It’s hers. ---他是她的。
2当不知道对方是谁的时候，用“it”来代替
e.g. （Someone is knocking at the door.）
---Who is it? ---谁呀？
---It’s the postman. ---是邮递员。
3代表前面提到的某件事。
E.g. I had a talk with my teacher. It was very helpful.
我同老师谈了一次话，这次谈话对我很有帮助。
4 “it”还可以指时间，距离和自然现象等。
E.g. ---What time is it now? ---现在几点了？
---It is half past eight. ---8:30了。 （指时间）
It is three kilometers from my home to school. 从学校到我家十三千米的路程。（指距离）
---How is the weather? ---今天天气怎么样？
---It is sunny. ---今天晴天。 （指天气）
It is very noisy at that moment. 那时乱哄哄的。 (指环境）
三. 用作先行代词。
1. it用做形式主语。当主语是动词不定式，动名词或者主语从句时，为了避免头重脚轻，常把主语放在谓语动词之后，而把"it"放在主语的位置做形式主语。放在谓语动词之后的主语才是真正的主语。 1代替不定式短语。 □
E.g. It is necessary for us to learn a foreign language. 对于我们来说，学一门外语是很重要的。
It is easy to be wise after the event。 当事后诸葛亮是容易的。
2代替动名词。 □
It is not easy being a guest in a different culture. 在不同文化的地方做客是不容易的。
It is good fishing in troubled water. 浑水之中好摸鱼。
3代替主语从句。 □
It is strange that nobody knows where he lives. 没人知道他住在哪里真是很奇怪。
It doesn’t interest me whether you come or not. 你是否来我并不感兴趣。
2 it做形式宾语。当复合宾语中的宾语是不定式，动名词或宾语从句时，往往把宾语放在它的补语后面。而把it放在宾语的位置做形式宾语。放在宾补后面的宾语是真正的宾语。
□1代替动词不定式。
I found it very necessary to study English. 我发现学习英语很必要。
Buses make it easy to get to the place. 公共汽车使到达这个地方很容易。
2 代替动名词。 □
I think it no use telling them. 我认为告诉他们没用。
I consider it foolish meeting him. 我认为去见他是愚蠢的。
3代替宾语从句。 □
I think it important that we should keep quite in class. 我认为我们在课堂上保持安静是重要的。 They want to make it clear that they are doing an important job.他们想弄清楚他们正在做一项很重要的
工作。
四 it用于强调句型中。
当我们要强调句中的某一部分时（一般是主.宾.状），通常用“It is +被强调部分+that(who)+句子其余部分。
□1 强调主语。
E.g. It was Tom who had a fight just now. 刚才是汤姆打了一架。
2 强调宾语。 □
E.g. It is the game that I love best. 他就是我最喜欢的游戏。
3 强调状语。 □
E.g. It was yesterday that I bought the book.. 我是在昨天买的这本书。
It is the city that I met him. 这就是我遇见他的那个城市。