定语从句里的宾语在什么位置 什么是先行词（最好举例子）

定义：在复合句中,修饰某一名词或代词的从句叫做定语从句。如：1) The man who lives next to us is a policeman。2) You must do everything that I do。上面两句中的man和everything是定语从句所修饰的词,叫先行词,定语从句放在先行词的后面。引导定语从句的词有关系代词that,which,who(宾格who,所有格whose)和关系副词where,when、why关系词常有三个作用：1、引导定语从句 2、代替先行词 3、在定语从句中担当一个成分二、关系代词引导的定语从句1。who指人,在从句中做主语(1)The boys who are playing football are from Class One。(2)Yesterday I helped an old man who lost his way。2。whom指人,在定语从句中充当宾语,常可省略。(1) Mr。Liu is the person (whom) you talked about。注意：关系代词whom在口语和非正式语体中常用who代替,可省略。(3) The man who/whom you met just now is my friend。3。which指物,在定语从句中做主语或者宾语,做宾语时可省略(1) Football is a game which is liked by most boys。( which 在句子中做主语) (2) This is the pen (which) he bought yesterday。( which 在句子中做宾语)4。that指人时,相当于who或者whom；指物时,相当于which。在宾语从句中做主语或者宾语,做宾语时可省略。(5) The people that/who come to visit the city are all here。(在句子中做主语)(6) Where is the man that/whom I saw this morning?(在句子中做宾语)5。whose通常指人,也可指物,在定语从句中做定语(1) He has a friend whose father is a doctor。(2) I lived in a house whose roof has fallen in。whose指物时,常用以下结构来代替(3)The classroom whose door is broken will soon be repaired。=The classroom the door of which is broken will soon be repaired。(5)Do you like the book whose color is yellow?=Do you like the book the color of which is yellow? 再问： 怎么看出whom是宾语，宾语在是么之后？