He drove home as quickly as he could only to find his house (had been destoryed) in the fire

问题描述:

He drove home as quickly as he could only to find his house (had been destoryed) in the fire
为什么不用was being destoryed?
再说明白点

你的意思是过去进行时,说明他开车回去房子正在被毁
题目的意思是他开车回家发现房子已经被毁了