英语自学网 发表于 2016-7-11 17:49:49

虚拟语气---混合条件句

　　主句与从句的动作发生在不同的时间，这时主，从句谓语动词的虚拟语气形式因时这叫做混合条件句。
        　　If you had asked him yesterday, you would know what to do now.
        　　(从句与过去事实相反，主句与现在事实相反。)
        　　If it had rained last night (过去), it would be very cold today (现在).
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