介词+关系代词 “介词+关系代词"引导的定语从句是定语从句的一种复杂形式，这类定语从句的关系代词主要有which ,whom , whose , 它们既可以引导限定性定语从句，也可以引导非限定性定语从句.关系代词前该选用什么样的介词，要根据不同的语境、习语、惯用法等来决定。 一．介词选择的主要标准 1.介词与定语从句的先行词是一种习惯性搭配 Human facial expressions differ from those animals in the degree to which they can be controlled on purpose.人类的面部表情和动物的面部表情就可控制的程度来说是不一样的。( to a degree ) The gentleman about whom you told me yesterday proved to be a thief.你昨天告诉我的那个绅士被证明是个小偷。（ tell sb. about sb./ sth. ) The English play in which my students acted at the New Year’s party was a great success。那场在新年晚会上我学生参加表演的英语剧很成功。( in the play ) The schools themselves admit that not all children will be successful in the jobs for which they are being trained.学校本身承认，并不是所有的孩子都能在他们所接受的培训的职业成功.（ be trained for the job ) 2.介词与定语从句中的动词是一种习惯性搭配 Who is the man with whom our teacher is shaking hands？ 我们的老师与之握手的那个男士是谁？ ( shake hands with sb. ) Last month ， part of Southeast Asia was struck by floods ， from whose effects the people are still suffering。 上个月，东南亚的部分地区发生洪水,人们还在遭受着洪水所带来的影响。（suffer from sth。 ） 3.介词与定语从句中的形容词构成一种习惯性的搭配 Ours is a beautiful country , of which we are greatly proud 。 我们的国家是一个美丽的国家，我们为之感到很自豪。( be proud of ) The woman to whom Spielberg is married is an actress。 同斯皮尔伯格结婚的女人是一位演员。（ be married to ) The West Lake , for which Hangzhou is famous， is a beautiful place。 西湖很美,杭州以西湖而闻名。( be famous for ） The woman to whom he was engaged was a doctor. 他与之订婚的那个女士是位医生。 (be engaged to ） 4.有时关系代词前用什么介词，要根据句子的意思来决定，此时不但要注意其前的搭配，也要注意其后的搭配 I was a woman running toward me in the dark。 Before I could recognize who she was, she had run back in the dark.Before I could recognize who she was ， she had ran back in the direction from which she had come.看见一位妇女在黑暗中像我走来,我还没来得及认清她是谁,她已经从她来的方向跑回去了.（如果仅注意先行词，很容易受习惯心里的影响而使用in this direction 的搭配，但考虑到语境后的come ，则应该使用from。) He was educated at the local high school, after which he went on to Beijing University. 他在当地一所高中上学，之后他上了北京大学。（after which 的意思就是“在当地一所高中接受完教育之后"）。 In the office I never seem to have time until after 5：30 pm。 by which time many have got home.在办公室我好像总是没时间,只有等到下午五点半，而那个时候大家都已经回家了。(此句不能受at 5：30 pm 的通常表达的影响而选用介词at， 而应该依据整个句子的语意来确定介词。） 5.表示“所有格”或“整体与部分关系”时，用介词of The journey around the world took the old sailor nine months, of which the sailing time was 226 days.这次环球旅行老水手用了9个月，其中航行的时间是226天。 The factory produces half a million pairs of shoes every year, 80％ of which are sold abroad. 这个工厂每年生产50万双鞋,其中的（指50万双鞋)80%销往海外. I was told that there were about 50 foreign students studying Chinese in the school， most of whom were from Germany.我被告知这个学校有大约50个外国学生在学习中文,其中大多数来自德国。 I have many friends,of whom some are businessmen。 我有很多朋友，其中有些是生意人。 二．介词不能提前的情况 当关系代词在定语从句中作介词的宾语时,介词可以提前放在which（指事物不能用that)或者whom(指人不能用who）之前,也可放于原来的位置,但在含有介词的动词固定短语中,由于动词和介词的关系比较紧密，一般不能将介词与动词拆开而将介词提到关系代词之前。这类短语动词有listen to/look at/depend on/take care of/look into/break into/get rid of/look forward to等。 This is the room which/that Lu Xun used to live in。(=This is the room in which Lu Xun used to live.)这是鲁迅曾经住过的房间. The man 本文来源：https://www.wddqw.com/doc/bee1f4ad8462caaedd3383c4bb4cf7ec4afeb6c4.html