介詞引導的定語從句
定語從句，一個簡單句跟在一名詞或代詞后(先行詞)進行修飾限定，就叫做定語從句。在主句中充當定語成分。被修飾的詞叫先行詞。下面小編為大家?guī)斫樵~引導的定語從句，僅供參考，希望能夠幫到大家。
介詞引導的定語從句
要掌握"介詞+關系代詞"引導的定語從句，我們要注意以下五點：
1.某些在從句中充當時間，地點或原因狀語的"介詞+關系詞"結構可以同關系副詞when 和where 互換。
例如：
This is the house in which I lived two years ago. →This is the house where I lived two years ago. 這就是我兩年以前住過的那間房子。
Do you remember the day on which you joined our club? →Do you remember the day when you joined our club? 你還記得你加入我們俱樂部的那一天嗎?
2. “介詞 + which / whom ”構成的定語從句。
介詞后只能用which / whom，不用who / that，但當介詞放在后面時，在限定性定語從句中，可用that代替which / whom，并且that可省略。在非限定性定語從句中只能用關系代詞which / whom。例如：
我向你請教的那個問題現(xiàn)在已經解決了。
【誤】The problem about that I consulted you has now been solved. (錯)
【正】 The problem about which I consulted you has now been solved. (對)
【正】The problem I consulted you about has now been solved. (對)
3. “名詞+ 介詞+which / whom”引導的定語從句。
例如：
We had a meeting the purpose of which was completely unclear. 我們開了一個會，會議的內容還不完全清楚。
He mentioned a book of which the title has slipped my memory. 他提到了一本書，可是書名我記不起來了。
4. 在非限定性定語從句中of which / whom 可用來修飾不定代詞 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.自然界中發(fā)現(xiàn)了103種金屬元素，大都是金屬。
We are all familiar with flashlights, portable radios and car lighting systems, all of which use batteries as their source power. 我們所熟悉的手電筒，袖珍收音機和汽車照明系統(tǒng)，他們都是用蓄電池作為電源的。
5. “介詞+ which +名詞 ”引導的定語從句。
which是一個代表所有關系的關系代詞，可用來代表一個名詞/代詞或句子的一部分，但更多地是來代表整個句子。其中的名詞通常是一個抽象名詞，如：case, fact, state, time, point等。例如：
He may be late, in which case we ought to wait for him. 他可能要遲到，因此我們應該等他。
He lost his temper, at which point I decided to go home. 他發(fā)脾氣了，這時我決定回家。
由“介詞+關系代詞”引導的定語從句用法
1. 由“介詞+關系代詞”引導的定語從句主要用于正式文體，在非正式文體中通常將介詞放至句末。如：This is the man to whom I referred. 我指的就是這個人。This is the man (whom) I referred to. 我指的就是這個人。
2. 直接用于介詞后作賓語的關系代詞which不能換成that，直接用于介詞后作賓語的關系代詞whom不能換成who。但若介詞用于句末，則用作賓語的which, whom也可換成that, who，或者省略不同。如：這是一個我們討論了許多的問題。This is a subject about which we have talked a lot.(which不能換成that，也不能省略)This is a subject which we have talked about a lot. 這是一個我們討論了許多的問題。(which可以換成that，也可以省略)
3. 關系副詞when, where, why根據(jù)情況有時可換成“介詞+關系代詞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. 那就是他住過的房子。That is the reason why [=for which] he must apologize. 那就是他必須道歉的原因。
4. 在很正式的文體中，“介詞+關系代詞”引導的定語從句可緊縮成“介詞+關系代詞+不定式”結構。如：在那兒孩子們有個玩耍的花園。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. (較正式)正：There the children had a garden to play in. (較口語化)注：這類“介詞+關系代詞++不定式”結構中的介詞不能沒有，也不能放在句末。如不能說There the children had a garden which to play in.
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