介词+关系代词的结构，你会用吗?对于“介词+关系代词”结构的遥，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.
这是一个我们可能遥间争论的问题。
(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遥，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.
历史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in the 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遥。
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)