Question

关于名词性从句的一道题

At last he found he was back in which he had been.
这里in which应改成where。
请问下，这句话是不是名词性从句，he was back in which he had been能分析下句子结构吗....?为什么这里in which不能用？

Answer 1

这句话是名词性状语从句，he was back where he had been整个是一个宾语从句
where he had been是地点状语从句，where是一个引导词，并不相当于to whitch，这个从句就不是名词性从句了，所以只能用where
he【主语】was back【系表结构作谓语】where he had been【地点状语从句】。
这句话的意思是：
最终他发现他又回到了他早已去过的地方。