先行词前有介词 用什么引导词

先行词前有介词 用什么引导词

当先行词前有介词时，常见的只能用which,或whom
1.当先行词为物时用which
This is the book from which I learned a lot
这就是那本我从中受益良多的书。
2.现行词为人时用whom
This is the person to whom I talked before
这就是那个我刚和它说话的那人。
希望对你有帮助。