1. when用于时间状语从句，如：The day when I first came to the school.2. where用于地点状语从句，如：Shanghai is the city where I was born.3. why用于原因状语从句，如：Please tell me the reason why you missed the plane.常见考法：定语从句考查多以单选形式，重点是关系词的意义和...
初中英语知识点总结——定语从句
定语从句，一种在复合句中修饰名词或代词的从句类型，由关系代词或关系副词引导。相当于形容词，在句中作定语。被定语从句修饰的词叫先行词。
关系代词有who, whom, that, whose等，可以指人或物；关系副词有where, when, why, how等，通常指地点、时间、原因或方式。
一、关系代词引导的定语从句：
1. who, whom, that, whose引导的定语从句，who和whom分别作主语和宾语，that可以作主语或宾语（省略宾语时），whose指人或物。
例：Is he the man who/that wants to see you? He is the man whom/that I saw yesterday.
2. which, that引导的定语从句，代替事物，作主语或宾语，作宾语时可省略。如：Prosperity that had never been seen before appears in the countryside.
注意：代表物时多用which，但有例外情况：
a）先行词是anything, everything, nothing, none等不定代词时；
b）先行词由every, any, all, some, no, little, few, much等修饰时，that常被省略；
c）先行词前有序数词或被形容词最高级修饰时；
d）整个句中前面已有which，who，that时；
e）当先行词为物并作表语时；
f）先行词为one时；
g）先行词同时被the only, the very, the same修饰时。
二、关系副词引导的定语从句：
1. when用于时间状语从句，如：The day when I first came to the school.
2. where用于地点状语从句，如：Shanghai is the city where I was born.
3. why用于原因状语从句，如：Please tell me the reason why you missed the plane.
常见考法：定语从句考查多以单选形式，重点是关系词的意义和功能，如that，which，who的运用。
经典例题：You're the only person I've ever met could do it.答案：D
误区提醒：表示时间或地点的名词作先行词时，需区分在从句中作状语还是主语或宾语，作状语时用关系副词，作主语或宾语时用关系代词。
经典例题：I can never forget the day we worked together and the day we spent together.答案：A2024-10-13
