高中英语破题致胜微方法（虚拟语气）：根据语境判断条件句中的虚拟语气

If引导的条件状语从句可以分为两类，一类是真实条件句，另一类是虚拟条件句。在虚拟条件句中，需要使用虚拟语气。那么如何来判断if引导的条件状语从句是不是虚拟条件句，虚拟条件句中又应该使用什么时态呢？这节课我们就来学习一下。 一.判断依据——语境 凡是假设的情况实现的的可能性很大，就是真实条件句。当假设的情况实现的可能性很小或者假设的情况与事实相反时，就是虚拟条件句。所以判断的依据是看语境中假设的情况是否可以实现。例如： 真实条件句： Today Iam not busy. If I have time , I will help you with this work. （“我有时间”的可能性很大，“帮助你”的可能性也很大） 虚拟条件句： 1. If I were you , I would have attended the meeting. （“我成为你”的假设无法实现） 2.My grand father died ten years ago. If my grandfather were alive today, he would experience a very different world.（假设的情况与事实相反） 二.虚拟条件句中动词时态的变化[来源:学科网] 判断这个假设是与哪个事实相反。通常有三种情况：①与现在事实相反。②与过去事实相反。③与将来事实可能相反。所以虚拟条件句中动词时态的变化分为三大类： 虚拟的时间 从句的谓语形式 主句的谓语形式 表示与现在事实相反 did或were （be的过去式一般用were） would（could/might/should）+do 表示与过去事实相反 had done would（could/might/should）+have done 表示与将来事实相反 did或were were to do should do would（could/might/should）+do 三.根据语境判断单选题中的虚拟语气 1. Mary is ill today. If she _____，she ____ absent from school. A. were not ill; wouldn't be B. had been ill; wouldn't have been