Question

英语翻译But the best subject always was when the first roommate

Answer 1

但是最好的主题经常就是当第一个室友描述他在窗外所有能看到景色的时候.

but the best subject 是主语, was是谓语动词, when the first roommate described all the things he could see outside the window 是宾语.

he could see outside the window 是all the things的定语.