定语从句中除了从句的谓语动词含有的介词不能动之外无论是主句的介词还是从句的介词都能提到介词之前是吗

Question

定语从句中除了从句的谓语动词含有的介词不能动之外无论是主句的介词还是从句的介词都能提到介词之前是吗？
比如Along the wall stand several bookshelves on which are all kinds of books. 这里的on是stand on中的
In the bag he found a piece of paper on which were written some special words.这里的on 是write on中的
不知道这么理解对么

Answer 1

Along the wall stand several bookshelves { on which are all kinds of books. }
地点介词短语 谓语动词 主语 定语从句，先行词是bookshelves，这句定语从句这么理解： all kinds of books are on the bookshelves. which指代bookshelves。
而不是你理解的stand on
而且地点介词短语放句首，句子要全倒装。

In the bag he found a piece of paper on which were written some special words.
地点介词短语 主语 谓语 宾语 定语从句，先行词是paper ,which指代paper
这里的on也不是write on.

你的问题问的本身就不对。没有你那么说的。
定语从句中有一种结构是介词+关系代词
如 The pencil _______he used to write is broken.
A. in which B. by which C. with which D. with that
解题：考的是“介词+关系代词”结构，关系代词指物的话用which,指人whom,先把D选项排除了。剩下这三项选择哪个呢？我们先从先行词下手，pencil是工具范畴，介词搭配一般用with,选择C.
不能用于“介词+关系代词的情况：
含有介词的固定的动词短语一般不拆开使用，如：look for, look after, take care of等不能把介词提前。
eg: This is the watch which/that I am looking for.

Answer 2

有些动词加介词的短语不能分开，如look at,listen to,就不能将介词分开提前，有些可分的就可以提前，如this is the room that he lived in=this is the room in which he lived.
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Answer 3

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