Do you remember the day which we spent together 这里为什么用which能用when吗

问题描述:

Do you remember the day which we spent together 这里为什么用which能用when吗
我个人认为we spent together 能构成完整句子就缺时间状语,那么为什么用which

we spent together 不能构成完整的句子 因为spend是及物动词,必修要有宾语
所以从句却宾语,用which或that