介词引导的定语从句
定语从句，一个简单句跟在一名词或代词后(先行词)进行修饰限定，就叫做定语从句。在主句中充当定语成分。被修饰的词叫先行词。下面小编为大家带来介词引导的定语从句，仅供参考，希望能够帮到大家。
介词引导的定语从句
要掌握"介词+关系代词"引导的定语从句，我们要注意以下五点：
1.某些在从句中充当时间，地点或原因状语的"介词+关系词"结构可以同关系副词when 和where 互换。
例如：
This is the house in which I lived two years ago. →This is the house where I lived two years ago. 这就是我两年以前住过的那间房子。
Do you remember the day on which you joined our club? →Do you remember the day when you joined our club? 你还记得你加入我们俱乐部的那一天吗?
2. “介词 + which / whom ”构成的定语从句。
介词后只能用which / whom，不用who / that，但当介词放在后面时，在限定性定语从句中，可用that代替which / whom，并且that可省略。在非限定性定语从句中只能用关系代词which / whom。例如：
我向你请教的那个问题现在已经解决了。
【误】The problem about that I consulted you has now been solved. (错)
【正】 The problem about which I consulted you has now been solved. (对)
【正】The problem I consulted you about has now been solved. (对)
3. “名词+ 介词+which / whom”引导的定语从句。
例如：
We had a meeting the purpose of which was completely unclear. 我们开了一个会，会议的内容还不完全清楚。
He mentioned a book of which the title has slipped my memory. 他提到了一本书，可是书名我记不起来了。
4. 在非限定性定语从句中of which / whom 可用来修饰不定代词 all, each, one, many, much, more, most, any, some, a few, a little, none, both, several, enough the latter, the former等。
例如：
There are 103 elements found in nature, most of which are metals.自然界中发现了103种金属元素，大都是金属。
We are all familiar with flashlights, portable radios and car lighting systems, all of which use batteries as their source power. 我们所熟悉的手电筒，袖珍收音机和汽车照明系统，他们都是用蓄电池作为电源的。
5. “介词+ which +名词 ”引导的定语从句。
which是一个代表所有关系的关系代词，可用来代表一个名词/代词或句子的一部分，但更多地是来代表整个句子。其中的名词通常是一个抽象名词，如：case, fact, state, time, point等。例如：
He may be late, in which case we ought to wait for him. 他可能要迟到，因此我们应该等他。
He lost his temper, at which point I decided to go home. 他发脾气了，这时我决定回家。
由“介词+关系代词”引导的定语从句用法
1. 由“介词+关系代词”引导的定语从句主要用于正式文体，在非正式文体中通常将介词放至句末。如：This is the man to whom I referred. 我指的就是这个人。This is the man (whom) I referred to. 我指的就是这个人。
2. 直接用于介词后作宾语的关系代词which不能换成that，直接用于介词后作宾语的关系代词whom不能换成who。但若介词用于句末，则用作宾语的which, whom也可换成that, who，或者省略不同。如：这是一个我们讨论了许多的问题。This is a subject about which we have talked a lot.(which不能换成that，也不能省略)This is a subject which we have talked about a lot. 这是一个我们讨论了许多的问题。(which可以换成that，也可以省略)
3. 关系副词when, where, why根据情况有时可换成“介词+关系代词which”。如： That is the day when [=on which] he was born. 那就是他出生的日子。That is the house where [=in which] he lived. 那就是他住过的房子。That is the reason why [=for which] he must apologize. 那就是他必须道歉的原因。
4. 在很正式的文体中，“介词+关系代词”引导的定语从句可紧缩成“介词+关系代词+不定式”结构。如：在那儿孩子们有个玩耍的花园。正：There the children had a garden in which to play. (很正式)正：There the children had a garden in which they could play. (较正式)正：There the children had a garden to play in. (较口语化)注：这类“介词+关系代词++不定式”结构中的介词不能没有，也不能放在句末。如不能说There the children had a garden which to play in.
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