定语从句之,关系代词前介词的确定,如何选定介词:,1.根据从句中动词与先行词的逻辑关系，请体会： e.g. Is that the newspaper for which you often write articles? 2. 根据从句中动词或形容词的习惯搭配，如： e.g. Can you explain to me how to use these idioms about which Im sure. 3. 根据先行词与介词的搭配习惯，请体会： e.g. 1949 was the year in which the P.R.C. was founded.,4.非限制性定语从句中，要表示先行词的一部分时，可用“数词/代词 + of + 关系代词”的结构，如： e.g. There are 50 students in our class, of whom 20 have been to Beijing.,5. Whose从句可转换为“ of +关系代词”型，如： e.g. They live in a house, whose door opens to the south.,They lived in a house, of which the door opens to the south. They lived in a house, the door of which open to the south.,关系副词when, where, why可以用适当的介词+which来替代。如：when=in/on/at+which, where=in/on/at+which, why=for+which 介词的位置非常灵活，有时放在关系代词之前，有时放在动词之后。 Eg: This is the room where (in which) I lived. = This is the room which I lived in.,9、The man _ you are talking is in the next room.,A、to whom B、about whom C、about who D、whom,B,17、There are three libraries in our school, _ were built five years ago.,A、all of them B、either of them C、all of which D、both of that,C,Thank you!,