高一英语改错题,

题目

高一英语改错题,
I stayed there for one and a half hours and made sure that the girl was all hope you understand
hope you understand是什么用法啊？

答案

hope you understand,
我知道了,是前面stay的时态不正确,我在那里待了一个半小时,然后确信那女孩是全部.先待后确信,而且又有表示完成时的for ...时间状语,stay要用过去完成时
had stayed