表示地點的關係副詞 where
例句：這就是他被謀殺的那間房間。
未使用關代連接兩句時
1. This is the room.使用關代連接兩句
2. He was murdered in the room.
This is the room which he was murdered in .改成代替地點的關係副詞：關係副詞 = 介係詞 + which
This is the room in which he was murdered.
This is the room where he was murdered.
