新概念英语第二册第23课【特殊难点】

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Lesson 23

特殊难点

There Be & It Is

1.There Be

a)当代表一个不确定的人或物的名词作动词 “be” 的主语时，我们通常用There be + 名词的形式。e.g. There is a student in the classroom.

b) 虽然there看上去是主语，但真正的主语是动词be后面的名词。要是这个名词是复数，动词应是复数；动词be也可用于各种时态（除进行时）。例如：

There are 24 hours in a day.

There was only one primary school in the village before liberation.

There have been many such accidents on this road.

2.It Is

It 通常没有意义，但可以用来代表以下各种情况：

a)表示时间和日期：

What’s the time? It’s ten o’clock.

b)表示距离

How far is it to New York? It’s ten miles.

c)表示天气和温度：

It is hot / cold today.

d)用作形式主语

It’s hard to learn English well. (it代表to learn English well, 作形式主语)

It is possible that he never left his village. (it 代表that从句，作形式主语)

练习：

1.It is a pity that he could not come.

2.There is a bus that leaves in ten minutes.

3.There were some men digging up the road outside my house.

4.Look at those clouds. I think there will be a thunderstorm.

5.It is unusual for him to be late.

6.It has been very cold this year.

7.There has been no news of him.

8.I am sure it will be fine tomorrow.

9.After dinner there will be a long discussion on politics.

10.When will it be convenient for you to come?