内容正文:
四位一体——知识清单+难点突破+解题秘诀+易错题型
高中英语语法一点通——虚拟语气
知识清单
一、虚拟语气在if引导的非真实条件句中的运用
情况
从句
主句
与现在事实相反的假设
If+主语+动词过去式(be动词用were)
主语+would/should/could
/might+动词原形
If I were you, I should seize the chance to go abroad.
与过去事实相反的假设
If+主语+had done
主语+would/should/could
/might+have done
If you had taken my advice, you would not have failed in the exam.
与将来事实相反的假设
If+主语+were to/should+动词原形
主语+would/could
/might+动词原形
If he should not come tomorrow, we would put off the meeting until next Monday.
使用虚拟条件句时要特别注意以下几点:
1、 错综时间条件句
当条件状语从句表示的行为和主句表示的行为所发生的时间不一致时,被称为“错综时间条件句”,动词的形式要根据它所表示的时间作出相应的调整。
If you had followed my advice just now, you would be better now.
If it had rained last night, the ground would be wet now.
2、 if省略句
当条件状语从句中谓语含有were, had, should时,可以省略if,将were, had, should提到从句句首,变为倒装句式。
If I were at school again, I would study harder.
—Were I at school again, I would study harder.
If you had come earlier, you would have caught the bus.
—Had you come earlier, you would have caught the bus