大学英语：If I were you， I would be happy to do it.

　　If we had got the news， we could have prepared earlier.

　　If the job were to succeed， you should work harder.

　　第二大类：从句中用过去时或过去完成时的虚拟语气

　　1) would rather + 从句

　　2) wish + 从句

　　3) if only + 从句

　　4) as if/ as though + 从句

　　5) It’s time + 从句

　　I would rather you didn’t tell me the story now.

　　I would rather you had told me the story yesterday.