精选优质文档-倾情为你奉上虚拟语气模块一：if 条件句表示虚拟语气第一层次: if 条件句表虚拟的基本用法主句中谓语动词的形式if条件状语从句中谓语动词的形式与现在事实相反:与过去事实相反：与将来事实相反:第二层次：省略if发生倒装现象（把条件状语从句中的were, should, had放在句首，省去if ）If I were you, I would go there.-If you had come here yesterday, you would have met her.-If it should rain tomorrow, I would not go there-第三层次：省略if 的条件句，（用without , but for） 1. Without /But for 要不是your help, I would have failed. 2. But for the expenses(费用)，I would be abroad now
