一、与过去事实相反
条件句：
If I had known the meeting was canceled, I would have arrived earlier.
（如果我早知道会议取消了，我就会早点到。）
主句：
He would have called you last night if he hadn't been so busy.
（他昨晚本会给你打电话的，要不是太忙。）
含蓄表达：
If it hadn't rained, we would have gone hiking.
But for the storm, we'd have enjoyed the picnic.
（要不是下雨，我们本会去远足的；要不是暴风雨，我们会享受野餐的。）
二、与现在事实相反（通过过去时态表达）
条件句：
If I had more time, I would travel more.
（如果我有更多时间，我会多旅行。）
主句：
She would be a doctor now if she hadn't chosen law.
（如果她当初没学法律，现在就会是医生了。）
含蓄表达：
If I had studied harder, I would have passed the exam.
The project would have been a success if we had started earlier.
（如果我学习更努力，考试就会通过；如果我们早点开始，项目就会成功。）
三、与将来事实相反
条件句：
If I win the lottery, I will travel the world.
（如果我中彩票，我会环游世界。）
主句：
The company would have expanded by now.
We would have finished the project by the deadline.
（公司现在应该已经扩大规模了；我们本会按时完成项目的。）
含蓄表达：
If I had known you were coming, I would have baked a cake.
The meeting would have been different if you had attended.
（如果我知道你要来，我会烤蛋糕的；如果你出席了会议，情况会不同。）
四、特殊结构
含蓄虚拟条件：
Without your help, I would still be unemployed.
But for the accident, we would have won the race.
（要不是你的帮助，我仍然会失业；要不是事故，我们本会赢得比赛。）
省略if的条件句：
The meeting started promptly.
（条件句：If the meeting had started on time）
这些句子覆盖了虚拟语气的核心用法，包括与过去、现在、将来事实相反的情况，以及含蓄表达。通过练习这些结构，可以更好地掌握虚拟语气的应用场景。
