this is the house + i lived in the house last year 怎么把这两句话用定语从句合在一起中间要用关系副词where还是关系代词in which? 为什么? 比如说this is the house where i lived last year 或者是 this is the house in which i lived last year 这两句哪个对?为什么?

this is the house where i lived last year
this is the house in which i lived last year

都对
where作关系副词，不需要介词
which作关系代词表地点，介词可放在它前面，也可以房从句后，即this is the house which i lived in last year.

这两句话都是对的

都对啊
where=in which

你说的都对.
this is the house where i lived last year
=this is the house in which i lived last year
where = in which 意为：in the house

This is the house where I lived last year.
或是：
This is the house In which I lived last year.
关系副词= 介词+关系代词

前面的对