在英语写作和阅读理解中，虚拟语气是一种表达假设、愿望、建议等非真实情况的特殊语法结构。以下是一些考研英语虚拟语气表答案的例子：
1. 与现在事实相反的假设：
- If I were you, I would choose the red dress instead of the blue one.
- It is essential that the meeting (be) postponed until next week.
2. 与过去事实相反的假设：
- If I had known about the exam, I would have studied harder.
- They would have finished the project if they had not run out of resources.
3. 与将来事实可能不成立的假设：
- If it rained tomorrow, we would cancel the picnic.
- I wish I had a time machine; then I could go back to the past.
4. 表达愿望、建议：
- It is vital that you (be) more careful with your work.
- I wish you could join us for the trip; it would be fun.
5. 条件状语从句：
- Should you need any help, please don't hesitate to ask.
- Were he to win the contest, he would be very happy.
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