This the house where he was born?再那里添in

This is the house where he was born
This is the house in which he was born in =This is the house which he was born in
以上三个句子的意思是一样的

This the house where he was born 不用添in

可以说
This the house in which he was born
This the house which he was born in

This the house where he was born ？应该是
This is the house where he was born .或
This is the house in which he was born.而
This is the house which he was born in一般不用。

This the house in which he was born
This the house which he was born in

This the house where he was born in

这句话不用加in啊，用which时候要加
This is the house in which he was born.
This is the house which he was born in.