定語從句，一個簡單句跟在一名詞或代詞後(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。下面小編爲大家帶來介詞引導的定語從句，僅供參考，希望能夠幫到大家。
要掌握"介詞+關係代詞"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+關係詞"結構可以同關係副詞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。
介詞後只能用which / whom，不用who / that，但當介詞放在後面時，在限定性定語從句中，可用that代替which / whom，並且that可省略。在非限定性定語從句中只能用關係代詞which / whom。例如：
我向你請教的'那個問題現在已經解決了。
【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.自然界中發現了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，他們都是用蓄電池作爲電源的。
5. “介詞+ which +名詞 ”引導的定語從句。
which是一個代表所有關係的關係代詞，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. 他發脾氣了，這時我決定回家。
