法。 The teacher with whom the students in our class are popular isMr Wang, our English teacher. （be popular with）在我们班，深受学生欢迎的是王老师－－我们的英语老师。 （3）根据定语从句修饰的先行词确定介词，其先行词往往是表示时间、地点、原因、方法、工具等的词，它们与介词之间有一定的联系。当“介词＋关系代词”在定语从句中充当时间、地点、原因状语时，可分别用when, where, why替换。例如： I’ll never forget the day on which （= when ）I joined the army. 我永远也忘不了我参军的那一天。 The factory in which （= where）his father works is far away from my hometown. 他父亲工作的那家工厂离我们家乡很远。 I don’t know the reason for which （＝why）he was late for school. 我不知道他为何上学迟到。 This is the camera with which he often takes photos. 这就是他经常用来拍照的相机。 （4）根据句子的意思确定介词。有些句子，先行词完全一样，定语从句中谓语动词不是由固定的动词短语构成的，这时，要根据句子所要表达的意思，选用不同的介词。例如： This is the pilot for whom I boughta camera. （意思是：I bought a camera for the pilot. ）这就是我给他买相机的那位飞行员。 This is the pilot with whom my brother has worked for ten years. （意思是：My brother has worked with the pilot for ten years. ）这就是和我弟弟一起工作了十年的那位飞行员。 This is the pilot by whom my son was saved. （意思是：My son was saved by this pilot. ）这就是救了我儿子的那位飞行员。 2. 介词若与从句中的动词词组有关，可前置于关系代词前，也可置于动词后，但若此介词与动词为固定词组，则此介词一般不前置。例如： Yesterday we paid a visit to the house in which Lu Xun lived. →Yesterday we paid a visit to the house which Lu Xun lived in. 昨天，我们参观了鲁迅的故居。 This is the very pen that I’m look for. （look for为固定词组，则介词for不可前置。）那就是我正在找的那支钢笔。 3. 限定性定语从句中，介词前置时，关系代词不能用that，且不能省略；若介词后置，则可以用that，也可以省略。例如： This is the school in which I studied 3 years ago. →This is the school（which / that）I studied in 3 years ago. 这就是三年前我学习的那所学校。 4. 表示所属关系时，介词应用of，关系代词为which / whom, 即n. + of+ which / whom，可转换为whose+ n. 。例如： He lives in a room, the window of which faces west. →He lives in a room, whose window faces west. 他住的房间，窗子向西开着。 The child was saved by a man, the name of whom was not known. →The child was saved by a man, whose name was not known. 这个孩子被一位不知姓名的男子所救。 5. 表示整体中的一部分或……中最……的，介词一般也用of。例如： The Greens have two daughters, both of whom are college students.

定语从句中。

一注意关系代词的替换．

介词in，on，at，for等与关系代词which一起引导定语从句时，可与相关的关系副词when，where，why等替换。如：(1)America is the country in which George