It was this house where I was born.是主从还是定从?it做形式主语不是代替主语从句的么变成where i was born was this house但是又感觉像是定语从句,先行词是 house,where在从句里地点状语,像个关系副词引导的定语从句,糊涂啊,如果是定语从句，it 指代的主语是什么？
问题描述：
It was this house where I was born.是主从还是定从?
it做形式主语不是代替主语从句的么
变成where i was born was this house
但是又感觉像是定语从句,先行词是 house,where在从句里地点状语,像个关系副词引导的定语从句,糊涂啊,
如果是定语从句，it 指代的主语是什么？
答
定从。
答
it代表the house。
定语从句。
答
定语从句；
先看主句：It was this house,这是一个完整的句子.it 是形式主语.
where I was born,修饰先行词house,这是定语从句,where作为连系副词,意为在（到）……的地方.
答
我认为整个是强调句，跟eg：it was him/Tom who made this cake。是一个道理。只是house 后面结句子需要用where 引导，所以里面又套了个定语从句。我的那个例子也是这么解释。
不知道对不对，你当个参考吧！