精选优质文档-倾情为你奉上定语从句知识点:定语从句的两个重要概念:先行词和关系词1. 先行词:被定语从句所修饰的对象称为先行词。2. 关系词:重复指代先行词、起连接主句和从句的作用(who, that, which)3. 先行词指“人”,用关系代词who或whom,who的前面不能与介词搭配使用,whom在定语从句中不能作主语,但可作宾语或表语。4. 表示人或物的所有关系,用whose.5. 先行词指“物”,用关系代词which6. that可以指“人”,也可以指“物”:1) 当先行词既有“人”,又有“物”时,用that2) 先行词为指“物”的all, little, few, much, none, the first时,用that3) 先行词是不定代词something, anything, nothing, everything时,一般用that4) 先行词被any, only, all, every, no, some, much, few, little,序数词,形容词的最高级the only, the one, the