题目

If he___ to the teacher attentively，he ___the answer to the problem now．（　　） A. had listened； would have known B. listened； would know C. listened； would have known D. had listened； would know

If he___ to the teacher attentively，he ___the answer to the problem now．（　　）
  • A. had listened； would have known
  • B. listened； would know
  • C. listened； would have known
  • D. had listened； would know

题目解答

答案

从in the past year 判断前面条件状语从句是对过去进行假设，应该用过去完成时；而后面主句中的now则提示应该是对现在的虚拟，应该用would+动词原形，所以整个句子是混合型的虚拟语气，正确答案为D．

解析

步骤 1：分析条件状语从句的时间
从"in the past year"判断前面条件状语从句是对过去进行假设，应该用过去完成时。
步骤 2：分析主句的时间
而后面主句中的"now"则提示应该是对现在的虚拟，应该用"would + 动词原形"。
步骤 3：确定虚拟语气类型
整个句子是混合型的虚拟语气。