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1、in which, for which, on which, at which 的不同用法这些都是定语从句里面，由 which 引导的定语从句，介词提前。in which 可以翻译成在 里面for which 可以翻译成为了目的on which 可以翻译成在的上面，或具体时间的某一天at which 可以翻译成在里面或在上面这些介词的使用除了意思上的区别，具体是要以 which 引导的从句而定的。例如： (1) The school (that/which) he once studied in is very famous.= The school in which he once stud
2、ied is very famous.(2) Tomorrow I will bring here a magazine (that/which) you asked for. = Tomorrow I will bring here a magazine for which you asked.(3) I have a dresser in my bedroom, which there are many cosmetics on.= I have a dresser in my bedroom on which there are many cosmetics.(4)The dumplin
3、g House which he often has dumplings at is very popular.= The dumpling House is very popular, at which he often has dumplings.当然这只是介词作为基本意思的用法，还有一些固定搭配，得具体情况具体分析。例如：The plane may be several hours late, in which case theres no point in our waiting.（固定搭配：in the case)The speaker paused to examine his n
4、otes, at which point a loud crash was heard.（固定搭配：at the point)Ten years of hard work changed her greatly, for which reason he could hardly recognize her at first sight.（固定搭配：for the reason）The film at which I fell asleep was very boring.（Here at which is based on fell asleep at the film因为电影无聊而睡觉。 ）
5、The little creature in which scientists are interested is known as ET.（这里be interested in是词组原因）This is the book for which he is looking.（即等于 This is the book which he is looking for，这主要是因为 look for 这一短语）例题：1. I cant believe that the restaurant, _ I have eaten such wonderful meal, is going to be clos
6、e down. A. where B. at which C. about which【解答】选 B。这个是非限制性定语从句， at which 在功能上等于 where，但就本题而言只能选 at which。因为 at which I have eaten such wonderful meal 是一个插入语，where 固然可以引导，但是由于前面有了一个逗号，就只能用 at which 了。 “我难以相信我曾经在里面美美地吃过几顿大餐的饭店就要关张了。 ”非限制性定语从句主要就是先行词+逗号“， ”+介词+which 或者是先行词+逗号“， ”+which，它和限定性定语从句的最显著区别一
7、个是有逗号，一个是非限制定语从句总有 which。2. Wind power is an ancient source of energy _ we may return in near future.A. on which B. by which C. to which D. from which【解答】选 C。return to 其实，应该来说，就是一个固定搭配了，解释为回归到，但是呢，如果要说意思的话，也是说得通的，就是把句子换一换语序你就可以看出来了。 “we may return to wind power in near future.”也就是说，看到 prep.+ which 这
8、种形式，就可以直接把它扔到动词后面，然后在进行选择，看缺少哪个介词。3. We have gathered nearly 100,000 quilts, _up to half have gone to flood-hit areas.A. with which B. in which C. for which D. of which 【解答】选 D。这里的 which 指的是，nearly 100,000 quilts（被褥） ，也就是说，后半句的主语是在这 nearly 100,000 quilts 里面的 up to half。例：I dont know the reason why/f
9、or which he did it.The reason why/for which he was fired was not clear.There are many countries in Asia, of which China is the largest one.亚洲有很多国家，中国是最大的一个。附：whose 和 of which 的区别1. 关系代词 whose，引导定语从句时，既可指人，又可指物，在从句中只能作定语；of whom 只能指人；of which 只能指物，有时 whose 可以与 of whom 和 of which 互换使用。如：The girl whose
10、 hair is golden is from England. 头发金色的那个女孩是英国人。The house whose doors(of which the doors) are green is an office building. 门是绿色的那座房子是办公楼。2. “介词 + whose +名词”引导定语从句。 如：I love my motherland, for whose good future I will work hard. 我爱我的祖国，为了她美好的未来我要努力工作。3. 在下列情况下，一般只用 of whom 和 of which。(1) 定语从句的主语是 few,
11、 little, some, most, many, much 等时，一般只用 of whom 和 of which。In the room are lots of people, many of whom I dont know. 房间里有很多人，很多人我不认识。He has a lot of story-books, a few of which I have never read. 他有很多故事书，有几本故事书我还从未看过。(2) 定语从句的主语是数词、形容词的最高级时，一般只用 of whom 和 of which。如：The old man has three children, t
12、wo of whom are college students and one of whom is a manager. 那个老人有三个小孩，其中两个是大学生，另一个是经理。(3) 定语从句的主语是 all, none, both, neither, each 等不定代词时，一般只用 of whom 和 of which。如：There are fifty students in our class, all of whom are working hard. 我们班有五十个学生，所有这五十个学生学习都刻苦。He planted two trees last year, both of wh
13、ich are growing well. 去年他栽了两棵树，这两棵树都长得好。(4) 在定语从句中作表语的定语时，一般只用 of whom 和 of which。如：He has three brothers, of whom Li Lei is the youngest one. 它有三兄弟，李雷是他们中最小的一个。There are many countries in Asia, of which China is the largest one. 亚洲有很多国家，中国是最大的一个。(5) 形式不同。如：The house windows face south is our readin
14、g-room.A. of which B. whose C. which D. its【解答】此题正确答案是 B，不能选择 A。选择 of which 时应在名词前加上定冠词 the，也就是名词前有 the 就只能用 of which。如果名词前没有冠词，就用 whose。若上题改为The house the windows face south is our reading-room，则此题只能选 A 不能选 B了。(6) of which 除了可以表示所属关系外，还可以用来表示整体的关系，而 whose 则不能。例：He borrowed a book of which the autho
15、r was a peasant.In Barcelona the Chinese team got 16 gold medals, of which 12 were won by women.第一句中的 of which 就可以用 whose 来代替，因为这个句子中 of 是用来表示所属关系的。可改写成：He borrowed a book whose author was a peasant. 而第二句中的 of which 不能用whose 代替，因为这个句子中的 of 不是表示所属关系，而是表示整体与部分的关系。(7) 引导非限制性定语从句多用 whose，而很少用表示所属关系的介词 o
16、f 加上关系代词which。如：There is a mysterious lake at the foot of the hill, whose depth has never been measured. 山脚下有个神秘的湖，其深度从未被测量过。如介词 of 不表示所属关系，而是用来表示整体与部分的关系，此时就经常引导非限制性定语从句了。如：There are 102 elements found in nature, of which most are metals.The story about Long March, of which this is one example, are well written.Id like a car whose front lights are big and round.Id like a car, the front lights o
