时间状语从句中从句主句过去完成时,从句用什么时态?

问题描述:

时间状语从句中从句主句过去完成时,从句用什么时态?

英语语法中,叫做“第三类条件状语从句”或者“虚拟语态”
对过去表示虚拟
If I had had enough money,I would have bought that house.
从句用过去完成时,主句用过去将来完成时,也就是“would have done”的形式.