IF引导的三种时间虚拟条件句结构
在虚拟语气中，if引导的虚拟条件句是最为核心的，很多学生问我对应的三种时间结构是什么，今天我给各位同学进行了罗列。
| 从句 | 主句 | |
| 与现在事实相反 | if + 主语+ did/were… | 主语+ would/could/should/might do… |
| 与过去事实相反 | If+主语+had done… | 主语+would/could/should/might have done… |
| 与将来事实相反 | If+主语+ did/were to do/should do… | 主语+ would/should do |
给大家附上三个例句：
If I were you, I would try it. 与现在事实相反
If he had realized that, he would have run away while there was still time. 与过去事实相反
If it were to/should rain tomorrow, the meeting would be put off. 与将来事实相反