1.先行词在前,引导词在后.先行词一般就是引导词要修饰的名词.如He is the man whom she loves.(man是先行词,whom是引导词）
2.对
3.先行词指所要修饰的名词,这要看句子,不同的都.
引导词指代的就是先行词.在定语从句中,引导词有两种：关系代词和关系副词
关系代词：that,which,who,whose,whom
关系代词所代替的先行词是人或物的名词或代词,在句中充当主语、宾语、定语等成分
例如：Is he the man who/that wants to see you?
他就是你想见的人吗?（who/that在从句中作主语）
He is the man whom/ that I saw yesterday.
他就是我昨天见的那个人.（whom/that在从句中作宾语）
关系副词：where,when,why
关系副词可代替的先行词是时间、地点或理由的名词,在从句中作状语.
例如：There are occasions when (on which) one must yield.任何人都有不得不屈服的时候.
Beijing is the place where (in which) I was born.北京是我的出生地.
Is this the reason why (for which) he refused our offer?这就是他拒绝我们帮助他的理由吗?