高中英语语法讲解：虚拟语气在定语从句的使用

一、虚拟语气用于定语从句中

在It is (high, about)time(that) 句型中，that引导的定语从句中的谓语常用一般过去时来构成虚拟语气。

例：It s about time that we put an end to this controversy.

现在该是我们停止这场争论的时候了。

例：It is time we went to bed.

我们该去睡觉了。

二、虚拟语气用于if only 引导的从句中

在if only引导的从句中，谓语动词须采用虚拟语气，其用法与wish后宾语从句的用法基本相同，表示 但愿 ， 要是 就好了 的意思。

例：If only I knew what you wanted.

要是我知道你需要什么就好了。

例：If only he had arrived in time,he would not have been punished.

他要是准时到达就好了。

经典练习：

1、It s already six o clock now. Don t you think it s about time____?

A)we are going home

B)we go home

C)we went home

D)we can go home

2、If only the committee____the regulations and put them into effect as soon as possible.

A)approve

B)will approve

C)can approve

D)would approve

3、It s necessary____the dictionary immediately.

A)that he will return

B)that he returned

C)that he return

D)that he has to return

4、She must have had an accident, or he____then.

A)would have been here

B)had to be here

C)should be here

D)would be here

5、I apologize if I ____you, but I assure you it was unintentional.

A)offended

B)had offended

C)should have offended

D)might have offended点击下一页查看答案