1 If I were you, I would/could/should/might do it again.
==Were I you, I would/could/should/might do it again.
2 If I knew her address, I would/could/should/might visit her.
3 If it were to rain tomorrow, I would/could/should/might stay at home.
==Were it to rain tomorrow, I would/could/should/might stay at home.
虚拟语气是高二英语的重点和难点，记忆语法结构固然重要，但背诵典型例句也是一个捷径。
