非限制性定语从句是定语从句重要组成部分和高考重要考点,本文介绍其常见解题方法｡
　　
　　一､ 根据从句意义及关系词使用特点巧妙确定关系词
　　考点说明: 顾名思义,限制性定语从句就是对先行词有限制作用的定语从句,如果将从句省去,全句意义就不完整｡为体现定语从句和先行词密不可分的关系,定语从句前面不可用逗号｡非限制性定语从句就是对先行词没有限制作用的定语从句,如果将从句省去,主句意义完整｡为体现定语从句和先行词间较为松散的关系,定语从句前面常用逗号隔开｡和限制性定语从句一样,非限制性定语从句可由关系代词who, whom, whose, which和关系副词when, where引导,也可由关系代词as引导,但不可由关系代词that和关系副词why引导｡非限制性定语从句中关系词不可省略,也不可用一个关系词代替另一个关系词｡
　　典型题赏析:
　　1. The famous basketball star,_________tried to make a comeback, attracted a lot of attention. (NMET 2002北京､内蒙古､安徽春季)
　　A. where B. when
　　C. which D. who
　　析: D｡先行词The famous basketball star指特定的人,具有唯一性,因其在定语从句中做主语,因此该空应填who引导非限制性定语从句｡
　　2. I walked in our garden,_________Tom and Jim were tying a big sign onto one of the trees. (NMET 2005辽宁)
　　A. which B. when
　　C. where D. that
　　析: C｡先行词our garden表示地点,具有唯一性,因其在定语从句中做地点状语,因此该空应填where引导非限制性定语从句｡
　　3. York,_________last year, is a nice old city. (NMET 2003北京)
　　A. that I visited
　　B. which I visited
　　C. where I visited
　　D. in which I visited
　　析: B｡先行词York为专有名词,具有唯一性,因其在定语从句中做宾语,因此应用which引导非限制性定语从句｡
　　4. Anyway, that evening,_________I’ll tell you more about later, I ended up staying at Rachel’s place. (NEMT 2004浙江)
　　A. when B. where
　　C. whatD. which
　　析: D｡先行词that evening表示时间,具有唯一性,因其在定语从句中做介词宾语,因此应用 which引导非限制性定语从句｡
　　方法揭秘: 分析先行词性质看其是否具有唯一性,看没有定语从句修饰时句子意义是否明确,以确定其非限制性定语从句的性质;分析先行词在从句中的作用,选择正确关系词｡
　　
　　二､ 分析非限制性定语从句与先行词是否具有所属关系来确定定语从句的结构
　　考点说明: 非限制性定语从句与先行词常含所属关系,此时定语从句常由whom或which引导,用于the + 名词 + of whom(指人) / which(指物)结构或of whom(指人) / which(指物) + the + 名词结构,该结构前不可加and, but等连词｡
　　典型题赏析:
　　1. The journey around the world took the old sailor nine months,_________the sailing time was 226 days. (NMET 2004全国卷Ⅳ)
　　A. of which B. during which
　　C. from which D. for which
　　析: A｡由语境逻辑和标点符号可知,定语从句不是先行词nine months(指物)不可或缺的内容,而只是与其有所属关系,因定语从句与先行词可连成 and the sailing time of the nine months was 226 days而变成并列分句,因此该空应填of which,构成of which + the + 名词(sailing time)结构来引导非限制性定语从句｡
　　2. Recently I bought an ancient Chinese vase, _________was very reasonable.(NMET 2000上海)
　　A. which price
　　B. the price of which
　　C. its price
　　D. the price of whose
　　析: B｡分析语境逻辑借助标点符号可知,定语从句不是先行词an ancient Chinese vase(指物)不可缺少的内容,而只是与其有所属关系,因定语从句与先行词可连成and the price of the ancient Chinese vase was very reasonable而变成并列分句,因此该空应用the + 名词(price) + of which结构引导非限制性定语从句｡
　　方法揭秘: 分析语境逻辑并借助标点符号确定题干为非限制性定语从句的性质;分析定语从句与先行词是否具有所属关系以确定定语从句的关系代词及正确结构｡
　　
　　三､ 分析非限制性定语从句与先行词是否具有局部与整体的关系来确定定语从句的结构
　　考点说明: 非限制性定语从句与先行词间常存在着局部与整体的关系,此时定语从句常由whom或which引导,用于数词(不定量数词) + of whom(指人) / which(指物)结构或of whom(指人

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