在复合句中,修饰某一名词或代词的从句叫作定语从句,被定语从句所修饰的名词或代词叫作先行词。定语从句必须放在先行词之后,对其先行词起限定作用。引导定语从句的词叫关系词,它包括关系代词that,which,who,whom,whose等。例如:Aplaneisamachinethatcanfly.在这个句子中,machi In a compound sentence, a clause that modifies a noun or pronoun is called an attributive clause, and a noun or pronoun modified by an attributive clause is called an antecedent. The attributive clause must be placed after the antecedent, limiting its antecedent. The word that guides the attributive clause is called a relational word. It includes the relative pronouns that, which, who, who, whoe, etc. For example: Aplaneisamachinethatcanfly. In this sentence, town