I will never forget these days ①that we spent on the farm ②when we worked on the farmI will never forget these days ①that /which/\we spent on the farm .②when/on which we worked on the farm .为什么连接词不同?

问题描述:

I will never forget these days ①that we spent on the farm ②when we worked on the farm
I will never forget these days ①that /which/\we spent on the farm .
②when/on which we worked on the farm .
为什么连接词不同?

因为第一个中的spent 是及物动词,缺宾语,所以用关系代词that /which
而第二个中的worked 是不及物动词,定语从句缺的是状语,所以用关系副词when(表时间),或者一个可以作状语的介词短语on which