在表示强调的结构中，it 可用作先行代词，这种结构的句型如下：It +is/was +被强调的部分+that +其他部分。如果强调的部分是人，可用who, whom 代替that.

例如：

Professor Wang teaches us English every Monday afternoon.

王教授每星期一下午教我们英语。

强调主语：It is Professor Wang who teaches us English every Monday afternoon.

强调间接宾语：It is us whom Prof. Wang teaches English every Monday afternoon.

强调直接宾语：It is English that Prof. Wang teaches us every Monday afternoon.

强调状语：It is every Monday afternoon that Prof. Wang teaches us English.

1)该上课了，快。

It is time for class. Hurry up.

2)从这儿到你们学校远吗?不远，大约一公里。

Is it far from here to your school? No, it isn’t. It’s about a kilometer.

3)从我家到颐和园去很近。

It is very near from my home to the Summer Palace.

4)(天)正在下雨。

It’s raining now.考研

5)电灯是爱迪生发明的。

It was Edison who invented the electric light.

6)我认为学习一门外语是很重要的。

I think it important to learn a foreign language.

7)他通常一天读两次英语。

He made it a rule to read English twice a day.

8)从我家去天安门广场坐公共汽车大约要一个小时。

It takes about an hour to go from my home to the Tian’anmen Square by bus.