“介词+which”引导的定语从句,使用哪个介词,要根据定语从句的意义来定,没有固定搭配。例如:
The hotel room in which I stayed three nights in May was big and clean. 在五月我住了三天的那个酒店客房很大,很干净。这里用介词 in 是因为定语从句的谓语动词是 stayed,需要介词 in 来构成地点状语。
This is the question about which we had so much discussion. 这就是我们对其进行了如此多讨论的问题。定语从句中有 so much discussion,讨论的内容是关于这个问题,所以只能使用介词 about。