for which，on which，in which，when，where的用法的区别及各自的意思。

谈谈“介词+关系代词”的用法 一、用法说明介词+whom只能指人；介词+ which只能指物。如：Look, there comes Tom, for whom I have waiting for an hour. 瞧，汤姆来啦，我等他等了一个小时。Last Saturday evening, I went to Wu Dong’s birthday party, in which I met a foreigner named Jim. 上周星期六的晚上我去参加了吴东的生日聚会，在会上我会到了一个叫吉姆的外国人。She came into the house, on whose wall there was a portrait of Einstein. 她进入了房间，房子的墙壁上有一张爱因斯坦的画像。 二、注意事项(1) 有时，前面的介词可移到定语从句的中间或后面，此时whom可用who, that代替；which可以用that代替。而且who, whom, which, that都可省略。如：The man with whom you talked just now is our manager. —The man who you talked with just now is our manager. 你刚才与他谈话的那个人就是我们的经理。He handed me a pen, with which I wrote down my address for him. —He handed me a pen, which I wrote down my address with for him. 他递给我一支钢笔，我就用那支钢笔给他写下了我的地址。(2) 当先行词是时间、地点、原因从句时，介词+ which一般在定语从句中分别做时间、地点、原因状语，于是介词+ which可以分别用when, where, why代替。但若介词+ which不是作时间、地点、原因状语，则不能用when, where, why代替。如：Last week, I visited Shanghai, in which I have made several friends. —Last week, I visited Shanghai, where I have made several friends. 上周我参观了上海，在那儿我叫上几个朋友。I will remember the day forever on which I won the first place in the contest. —I will remember the day forever when I won the first place in the contest. 我将永远记住我在竞赛中获得第一名的那一天。原文见：

on/in/for 要看你把从句改成陈述语序后的动词
比如 The house in which Yaoming once lived.
其实就是 Yaoming once lived in the house.
这里live 要和house的话 应该加介词 in
其他几个也是同样的 看情况而定
做这种从句要先把语序调过来 就会很简单了

when 一般引导时间状语的
where一般是引导地点状语的 但也会有复杂用法
当先行词（就是你要修饰的那个词）是 situation/stage 事物某个方面等等抽象的地点状语 也要用where

when 和in/at/during which 状语时很多时候意思是一样的
where和in/at/on/under which 同上
why 和 for which 同上

每一个要根据语境来回答 关键是在介词上 比如说 i like the room we stay in which…… 你看如果没有in的话就成stay sp 不通顺的 for也一样 do you know the reason for which…… for表示承接 对于的意思 when是当……时的意思 跟on which一样 但是on which 是需要有介词的句子 in which=where 但是where 是直接表示地点的 in which 则作用于需要介词的句子 否则不通顺