Question

I have a house where my sisters live是什么从句？

Answer 1

where是关系副词引导的是定语从句，主句是 I have a house。先行词是地点，定语从句句子完整，使用关系副词where,这里也可以使用in which，相当于in the hour。

如果把句子改一下。

I have a house that/which my sisters live in.

这里关系代词that/which代替a house 做live in的宾语，可以省略。

补充一点：

1. 先行词为时间，定语从句句子完整，使用关系副词when.

I never forget the day when/on which we worked together.

定语句子不完整，使用关系代词that/which.

I never forget the day that/which we spent in the past.

2. 先行词为reason, 定语从句句子成完整用关系副词why.

I don't know the reason why you are late.

定语从句不完整，使用关系代词that/which.

I don't care about the reason that/which you told me.

Answer 2

I（主语） have（谓语） a（定语） house（宾语） where my sisters live（定语从句）.

我有一所我姐姐住着的房子。
where引导的是定语从句。

Answer 3

同位语从句。