Gone are the days when we lived on the farm.Gone are the days that/which we spent together.

Gone are the days when we lived on the farm.Gone are the days that/which we spent together.
我想问一下,这两个句子中when和that/which是不是都可以省略的?
我觉得这里是the days做we lived的宾语,直接修饰的the days,就像the day you went away一样,后面是状语.
这个是we spent the days,作宾语省略连接词.
结论是,只有从句结构完整或者the days作主语才用连接词.