定语从句中的介词定语从句中的介词定语从句在初中英语中的重要性主要体现在完形、阅读和写作中，因此，能否较好的掌握定语从句直接关系到你英语成绩的拔高。
其实，定语从句并不难，和店铺一起来学吧。
对于“介词+关系代词”结构的使用，重点是要弄清其中的介词如何确定和判断。
归纳起来，有以下几点方法：1. 根据与定语从句中动词的搭配来确定介词。
如：Water is the natural medium in which fish live. 水是鱼类赖以生存的自然环境。
(注意搭配live in)The documents for which they were searching have been recovered. 他们找寻的文件已经找到了。
(注意搭配search for) This is a subject about which we might argue for a long while. 这是一个我们可能长时间争论的问题。
(注意搭配argue about) 注意，对于那些由动词与介词构成的短语动词，通常不宜将它们拆开使用，此时应注意介词的位置应。
如：The boy (whom) my sister is looking after is getting better.不能说成：The boy after whom my sister is looking is getting better.2. 根据与定语从句中形容词的搭配来确定介词。
如：Physics is the subject in our school in which every student is interested. 物理是我们学校每个学生都很感兴趣的课程。
(注意搭配be interested in)He referred me to some reference books with which I am not very familiar. 他我要去参考一些我不熟悉的参考书。
(注意搭配be familiar with)3. 根据与先行词的搭配来确定介词。
如：This is our classroom, in the front of which there is a teacher’s desk. 这是我们的`教室，前面有老师的讲台。
(注意搭配 inthe front of our classroom)I’ll never forget the day on which she said goodbye to me. 我永远不会忘记她与我们告别的那一天。
(注意搭配 on the day)4. 根据句意来确定介词的使用。
如：This is the book from which I got the story. 这就是那本书，从中我读到这个故事。
(由于句意含有“从……”的意思，所以用介词from)This I did at nine o’clock, after which I sat reading the paper. 九点钟时我做这事，之后我坐着看报。
(由于句意含有“在……之后”的意思，所以用介词 after)以上就是店铺为大家总结的四种定语从句中的介词+关系代词”结构，希望大家可以铭记在心，并且需要通过以后的练习来逐渐透彻掌握。
学习中肯定会遇到一些困难，不好弄懂的知识点一定要结合例句细心多看几遍。
定语从句whose做定语一whose 是定语从句中一个常用的关系代词，它是关系代词who 的所有格，在从句中作定语，也就是说当先行词与从句中某个名词有所属关系，表达“……的”意思时，用关系代词whose 引导定语从句，它既可以指代人，也可以指代物，既可引导限制性定语从句，也可以引导非限制性定语从句。
例：①Mr King,whose legs were badly hurt, was taken to the hospital. 金先生腿受重伤，被送进了医院。
②They lives in a room whose window o pens to the south. 他们住在一间窗户朝南开的房间里。
whose短语在定语从句中有时可作介词宾语，即构成“介词＋whose＋名词”引导定语从句并在从句中作状语。
例：①The boss in whose department Mr King worked had heard about the accident. 金先生工作所在的部门领导已经听人说过这一意外事故。
②He is the student of whose brother we are always proud.他就是那个我们总是为他哥哥感到骄傲的学生。
whose引导定语从句时,通常可与of which/of whom引导的定语从句进行转换。
例：①I made a table,the surface of which(of which the surface)is quite smooth. 我制了张桌子，桌面很光滑。
I made a table, whose surface is quite smooth.②I live in a room whose window(the window of which或of which the window)opens to the south. 我住在一间窗户朝南开的屋子里。
③The professor of whom a daughter(a daughter of whom) has gone abroad is very famous in China. 那位他的女儿已经出国了的教授在国内很有名。
定语从句whose做定语二定语从句中whose的用法whose引导的定语从句是语法重点，也是高考中经常考查的语法内容之一。
要学好whose引导的定语从句的用法，应注意以下六个方面。
一、whose为who的所有格，作“某(些)人的……”解，它所指代的先行词必须是人，其引导的定语从句修饰它的先行词，同时它本身在从句中作定语。
This is the little girl whose parents were killed in thegreat earthquake.这就是在那次大地震中失去双亲的那个小姑娘。
Mr Liu wants to talk to the students whose homework hasn't been handed in.刘老师要跟那些没交家庭作业的学生谈话。
二、whose也可作which的所有格，作“某(些)物的……”解，它所指代的先行词必须是物，其语法同上。
The company whose name was Notco was in Australia.那个名叫诺特可的公司设在澳大利亚。
We live in a house whose windows open to the south.我们居住在一所窗户朝南开的房子里。
三、whose可修饰定语从句中的主语、宾语、介词宾语等不同成分。
Mr King，whose legs were badly hurt，was quickly taken to hospital.金先生的腿受了重伤，很快就被送往医院。
(whose修饰定语从句中的主语legs)We shall have to make a decision about Ms King，whose story I've just told you.关于金女士的情况，我刚才已经告诉你们了，我们得对她的事情作出决定。
(whose修饰定语从句中的宾语 story)四、whose既可引导限制性定语从句，亦可引导非限制性定语从句。
The boss in whose department Mr King worked called at the hospital.金先生工作单位的老板到医院来探视。
(限制性定语从句) The boss of the company，whose name was Mr Little，told the story.公司的老板叫利特尔，他讲述了这个故事。
(非限制性定语从句)五、由于whose具有兼作who和which的所有格的双重功能，故在指人时可用of whom代替whose，指物时可用of which代替whose。
This kind of book is for children whose native language(=the native language of whom)is Chinese.这种书是给母语是汉语的儿童看的。
Mr Brown has written a novel whose name(=the name of which)I've completely forgotten.布朗先生写了部小说，其书名我完全忘了。
I live in a room whose window(=the window of which)opens to the south. 我住在一间窗户朝南开的屋子里。
六、按英语习惯用法，下列情况中的whose和of whom或of which切不可混用：1.凡是of whom或of which同数词或代词(如some，many，little等)连用表示部分与整体关系时，通常不可用 whose。
There are 45 students in our class，35of whom are Leaguemembers.我们班有45名学生，其中35名是团员。
Mr White wrote many articles，some of which were translated into Chinese.怀特先生写了不少文章，其中一些译成了中文。
2.凡是of whom或of which修饰定语从句中的主语，是表示同位关系的代词both，all等时，切不可用whose。
I have two sons，both of whom serve in the army.我有两个儿子，都在部队服役。
He has some novels，all of which are written in Russian.他有一些小说，都是用俄文写的。
