一、考点讲解

　　虚拟语气表示说话人所说的话不是事实，而是一种假设、愿望、怀疑或推测。虚拟语气主要用于if条件状语从句，也可用于主语从句、表语从句、宾语从句等。

　　1.与现在事实相反的虚拟语气,if从句中的谓语用过去式(be用were),主句用would/could/mightshould+动词原形。

　　eg：If I had enough money, I would buy myself a computer.

　　2.与将来事实相反的虚拟语气，从句谓语过去式(be用were)/should+动词原形/were to+动词原形，主句谓语would/could/might/should do.

　　eg：If I were to do the job, I would do it in a different way.

　　3.与过去事实相反的虚拟语气，主句谓语should/would/could/might+have+过去分词,If 条件从句的谓语形式had+过去分词词。

　　eg：If the weather had been nice yesterday,we would have gone for a picnic.

　　4.wish后的宾语从句用虚拟语气，从句的谓语形式虚拟情况

　　(1)与现在事实相反用：过去式(be用were)

　　(2)与过去事实相反had+过去分词

　　(3)与将来事实相反would/ could/might+动词原形

　　5.would rather后的宾语从句用虚拟语气虚拟情况表示现在或将来的愿望，从句的谓语形式过去式( be用were),表示过去的愿望,用had+过去分词

　　eg：I would rather you came next Saturday.

　　6.as if/as though引导的虚拟语气谓语的形式与wish后的宾语从句的谓语形式一致。

　　eg：It seems as if it were spring already.

　　7.if only 意为“要是……就好了”，其后虚拟语气的用法与wish后的宾语从句的谓语形式一致。

　　eg：If only I were 20 years younger!(与现在事实相反)

　　If only I had come to the party yesterday!(与过去事实相反)

　　If only I could fly to the moon one day.(与将来事实相反)