1、定语从句的基本句型：①先行词+关系词（关系代词/关系副词）+从句（修饰先行词）eg: The student who answered the question was Tom.解析：【The student】是先行词，【who】关系代词，在从句中做主语；整个【who】引导的从句用来修饰【the student】。
3、定语从句和宾语从句使用的从句连接词不同。1、定语从句：蔡龇呶挞关系词的选择取决于先行词。 关系代词：that, who, whom, whic茑霁酌绡h, whose; 关系副词：when, where,why; eg: This boy who is playing the ball is my brother.2、宾语从句：连接词选择根据句子是肯定句、一般疑问句、特殊疑问句来定。 肯定句：that； 一般疑问句：whether、if； 特殊疑问句：特殊疑问词。 eg: He asked whether they would come.
