今天在網上看到一篇《高中定語從句之“介詞+關系代詞”，要點大大全》的文章，（加粗部分為援引原文部分）

1. I bought many books yesterday, three of which are written by Lu Xun.

請問three of which are written by Lu Xun是什么成分？

2.“介詞+which”在關系分句中分別可做時間、地址和緣由狀語，代替相應的關系副詞when、where和why，如I still rememberthe day on which I first came to school.

請問on which I first came to school做狀語成分，而不是the day的定語嗎?

1. I bought many books yesterday, three of which are written by Lu Xun.

? ??three of which are written by Lu Xun是非限制性定語從句，three of which?是從句的主語，are written 是被動語態作從句的謂語動詞，by Lu Xun 是are written 的修飾語 （狀語）。

2.“介詞+which”在關系分句中分別可做時間、地址和緣由狀語，代替相應的關系副詞when、where和why，如I still remember the day on which I first came to school.

? ? ? ?on which I first came to school?是限制性定語從句，修飾?the day?。on which 在定語從句中作時間狀語。