Unit 5 Languages around the WorldDiscovering Useful StructuresRestrictive relative clauses(一)定语从句的定义在复合句中,修饰______或______的从句叫定语从句。被修饰的名词或代词叫________,引导定语从句的词叫________。关系词分为关系_____和关系_____两类名词代词先行词关系词代词副词何时可以省略?做宾语时可以省略√√√√√√√√√√√√√√√(二)关系代词及其用法如何确...