题目
If he___ to the teacher attentively，he ___the answer to the problem now．（ ）A. had listened； would have knownB. listened； would knowC. listened； would have knownD. 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
D. had listened； would know
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。
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。