有关介词加which的问题,请英语好的人帮帮忙.HecamebacktohishometownFROMWHICHhehadbeenawayfortwentyyears.他重新回到了阔别20多年的家乡.为什么在which前加from呢?可以把fromwhich换成where吗?另：T

Question

有关介词加which的问题,请英语好的人帮帮忙.
He came back to his hometown FROM WHICH he had been away for twenty years.
他重新回到了阔别20多年的家乡.
为什么在which 前加from呢? 可以把from which换成where吗?
另：The seventeenth century was one IN WHICH many significant advances were made in both science and philosophy.
17世纪是一个科学和哲学都取得重大进步的世纪.
为什么在which 前加in呢? 谢谢!

Answer 1

第一句：这句话直接说就是 had been away FROM his hometown for twenty years
第二句：many significant advances were made in both science and philosophy IN The seventeenth century
不加介词的话很容易就看出语法错误了.
以后遇到类似的句子,可以采用这样的办法.把句子顺过来,就可以看出介词是否该放和该放哪个介词.