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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 | 
