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。
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？
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。
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。
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。
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.
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。
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。
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
18）It is difficult to translate this article. 翻译这篇文章很难。
19）It is getting harder every day for a lazy man to get a living. 懒汉谋生是日益困难了。
20）What time would it be most convenient for me to call again?什么时候我再给你打电话最合适？
21）It is no use going there so early. 这么早去那里没有用。
22）It has been a great honour your coming to visit me. 你的来访是我很大的荣幸。
23）It is strange that he did not come at all. 真奇怪，他竟还没来。
24）It doesn't matter what you do.什么都没关系。
To translate this article is difficult.
Going there so early is no use.
That he did not come at all is strange.
25）It seems that John is not coming after all. 似乎约翰终竟不来。
26）It happened that John was the only witness. 碰巧约翰是唯一的证人。
John doesn't seem to be coming after all.
John happened to be the only witness.
27）I found it difficult to explain to him what happened. 我觉得向他解释清发生了什么事很困难。
28）He thought it no use going over the subject again. 他认为再讨论这个问题没有用了。
29）They kept it quiet that he was dead. 他们对他的死保密。
30）We must make it clear to the public that something should be done to stop pollution.我们必须使公众明白应该采取措施制止污染。
31）It was Jane that/who called this morning. 是珍妮今天上午打来电话。
32）It was a parcel that she brought him. 她带给他的是一个包裹。
33）John gave Mary a handbag at Christmas. 约翰在圣诞节给了玛丽一个提包。
34）It was John that/who gave Mary a handbag at Christmas. 是约翰在圣诞节给了玛丽一个提包。
35）It was Mary that John gave a handbag （to） at Christmas. 约翰在圣诞节是给玛丽提包的。
36）It was a handbag that John gave Mary at Christmas. 约翰在圣诞节给玛丽的是一个提包。
37）It was at Christmas that John gave Mary a handbag. 是在圣诞节约翰给了玛丽一个提包。
38）It is not I who am angry. 发怒的不是我。
39）It was my two sisters who knew her best. 是我的两个姐妹最了解她。
40）It will not be you who will have to take the blame for this. 对此须受责难的将不是你。
41）It may have been at Christmas that John gave Mary a handbag. 可能是在圣诞节约翰给玛丽一个提包。
42）It might have been John who gave Mary a handbag. 很可能是约翰给了玛丽一个提包。
43）It was when she was about to go to bed that the telephone rang. 是在她即将上床睡觉时电话铃响了。
44）It was because I wanted to buy a dictionary that I went to town yesterday. 我昨天是由于想买一本词典而进城的。
45）It was not until his father came back that Tom went to bed yesterday.
It is beautiful that she is.
It is chairman of the Committee that he is.
46）It is the chairman of the committee that they elected him. 他们选他是作委员会主席。
47）It is green that they have painted the wall. 他们把墙壁漆的是绿色。
48）It was the President himself spoke to me.是总统亲自和我谈了话。（省去从句主语who）
49）It was the dog I gave the water to. 我是给那条狗水的。（省去从句的宾语that）
50）It was yesterday I first noticed it. 我是昨天开始注意到的。（省去从句连词that）
51）A good, honest trade you are learning, Sir Peter! 彼得爵士，你学得是一种很好而诚实的一行啊！
52）Now was it that his life was done, and the fate which he could not escape was upon him.就在这时，他的生命完结了，他所逃不脱的命运降临了。
53）When was it that he arrived at the village? 是何时他到达了这个村子？
54）Why was it that he was late for school? 他是为什么上学迟到的？
1. 分裂句引导词it与先行词it的区别： 比较：
55）It is surprising that Mary should have won the first place. 玛丽本应获得第一名，真令人吃惊！（先行词it）
56）It is Mary that has won the first place. 是玛丽获得了第一名。（分裂句引导词it）
2. 虚义it与分裂句引导词it的区别。 比较：
57）It was three o'clock in the morning when his father came back.（虚义it指时间） 他父亲回来时是凌晨3点。
58）It was at three o'clock in the morning that his father came back. （分裂句引导词it） 他父亲是在凌晨3点回来的。
3. 分裂句中that/who- 从句与that/who引导的定语从句之区别。 比较：
59）It is money that is most needed.（分裂句中的that-从句） 最需要的是钱。
60）This is the money that is most needed.（that引导定语从句） 这就是最需要的钱。
61）It is Mary who has broken the glass （分裂句中的who-从句） 是玛丽打破了玻璃杯。
62）Mary is the girl who has won the first place.（who引导定语从句） 玛丽是获得第一名的姑娘。
区别方法：如将句型It is/was…that结构去掉，而句子能还原成普通陈述句，则该句是分裂句，否则不是。如（56）例去掉It is …that
则变成： Mary has won the first place. 玛丽获得了第一名。
（58）例变成：His father came back at three o'clock in the morning. 他父亲在凌晨3点回来。
（59）例变成：Money is most needed. 钱是最需要的。
（61）例变成：Mary has broken the glass. 玛丽打破了玻璃杯。
63）I gave her a book.
What I did was （to） give her a look. 我所做的是给她一本书。
64）He took a plane to Beijing. What he did was （to） take a plane to Beijing. 他所做的是乘飞机去北京。
65）The student is going to write an article.
What the student is going to do is（to） write an article.这个学生要做的是写一篇文章。
66）What he gave her was a handbag. 他所给她的是个提包。
67）A handbag was what he gave her. 提包就是他所给她的。
（1）Possibly the Joneses will come to the party as well.
（2）Whether they will come or not doesn't matter very much.
（3）He is quite likely to let you down.
（4）You seem to have taken a dislike to him.
（5）I happen to have had some nasty experiences in dealing with him.
（6）Getting the car on the boat was rather complicated.
（7）To be with you here this evening is a great pleasure.
（8）You were so kind to invite us.
（9）What you say does not matter in the least.
（10）How he came to have such a valuable painting is a mystery.
（1）She has been studying French only for three months.
（2）He has painted the windows green.
（3）John bought the car from Henry.
（4）I met Henry in New York.
（5）He didn't come home until 11 o'clock last night.
（1）It is getting dark earlier in winter.
（2）It is no use asking her because she didn't know anything about it.
（3）It's two miles from here to the bus station.
（4）Have you seen it hailing?
（5）It is up to you decide what to do.
（6）It is said that he has been to the U.S.A. twice.
（7）It's a pity that you've missed the concert.
（8）It seems that he is much afraid.
（9）It's no use crying over spilt milk.
（10）It was several months before we met again.