if only虚拟语气从句只有两种变化形式?

if only 虚拟语气从句三种变化形式与现在事实相反用一般过去时态If only I were a bird。与过去事实相反用过去完成时态If only I had followed your advice yesterday。与将来事实相反用过去将来时态If only I could pass the exam next week。