定语从句中避免重复出现关系代词和关系副词的疑问

This is the house where I lived in two years ago 这句话需要去掉介词in 因为 where= in which 也就是in the house 后面再加in 就重复了
Is this the room where we were living in our childhood?这句里的in 与先行词 和关系词 没有关系 这是 in our childhood介词短语 作定语从句中的时间状语谢谢你！这里的live in应该是动词短语吧！我把 in two years ago理解为介词短语了，这里的 two years ago 是做时间状语的吧 ！这句可不可以写成This is the house where I lived before two years是的这里的live in可以 看成 是动介词组！ two years ago 是做时间状语的前面不需要in ！这句不可以写成This is the house where I lived before two years可以写成 he said he hadlived in the housetwo yearsbefore.