英语语法——与现在事实相反的虚拟语气

. 与现在事实相反的虚拟： If + did / were + ..., ... would/ should/ could/ might + do （*原形） If I were you, I would go abroad at once. (I am not you.) If he knew it now, he could help me. (He doesn't know it now.) 2. 与过去事实相反的虚拟： If + had done + ..., ... would (might) have done ... If I had known your telephone number yesterday, I would have phoned you. (I didn't know your telephone number.)