英语中 定语从句 介词 which

要不要用介词,以及用什么介词,取决于从句中的谓语,
举例：
This was not the house in the village (which) he liked.Like在这是及物动词,不需接介词
This was the house in the village(in which) he used to live.Live不及物动词,住在某个地方,常用介词in
然后你自己问的句中接to,bring to,bring sth from somwhere to else where
There was not a small house in the village (to which ) he had not brought food and comfort.

你分析句子就可以了。前面是说在这个村庄里没有这样一个小房子，后面解释这个小房子是来干嘛的，就是：to which 引导的从句来解释：a small house的。如果不加介词 to, 那么可以把（ to which）变成（where).为什么是where, 因为后面的从句是用来修饰一个地方的（a small house），所以用where , 为什么是TO和which 搭配，因为 从后面的从句看...

这里，是双重否定。实际想表达的是 He had brought food and comfort to every small house in the village.
句意为： 村庄里没有一个他不能带来食物与舒适感的小房子。 也就是说，他能给村庄里的每户人家带来食物与舒适感。
主要是bring sth to some people， 所以要用 to which...

There was not a small house in the village which he had not brought food and comfort to.

只用which语法上就不对了，关系代词which在从句中要做句子成分的（既不是主语也不是宾语）。介词的选用要根据相关的动词。