tome works in the factory ,they makes cars in factory改为定语从句

Tome works in the factory in which they makes cars .
句子中的 in which 可以用 where 替换为什么是where这样对吗。 Tom works in the factory wheremakes cars不对。where 只是当状语（地点状语），如果你这样写的话就是把where 当主语来用了不好意思，再追问一下。 这样对吗。 Tom works in the factory which makes cars 为什么一定要用where呢。。拜托你给我讲一下句子的成分。恩，没关系。不是一定要用where , 也可以用 in which 如果只用which ，那句子就成这样了------Tom works in the factory . The factory makes cars .这跟原句就不一样了。Tom works in the factory which makes cars 。句中which 是关系副词，指代先行词 the factoryTom works in the factory in which they makes cars . 句中的where 也是关系副词，指代 in the factory .