He finished his homework【 before his father came 】时间状语从句 对吗

问题描述:

He finished his homework【 before his father came 】时间状语从句 对吗

不对
应该是
He 【had finished】 his homework【 before his father came 】
因为发生在came这一过去动作之前
所以用过去完成时