关于定语从句，求助，谢谢

先行词是定语从句的宾语的话，关系词就可以省略，如果是定语从句的主语，就不能省略。这句话是没有错的。

先行词：是指被定语从句修饰的名词、代词称为先行词。

因此在定语从句中，名词、代词做的成分就是主语、宾语、定语或者状语。
1、who, whom, that
这些词代替的先行词是人的名词或代词，在从句中所起作用如下：
(1) 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）
(2) 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）
2、Whose 用来指人或物，(只用作定语, 若指物，它还可以同of which互换）
(1) They rushed over to help the man whose car had broken down. 那人车坏了，大家都跑过去帮忙。
(2) Please pass me the book whose (of which) cover is green. 请递给我那本绿皮的书。
3、 which, that 它们所代替的先行词是事物的名词或代词，在从句中可作主语、宾语等，例如：
(1) A prosperity which / that had never been seen before appears in the countryside. 农村出现了前所未有的繁荣。（which / that在句中作主语）
(2) The package (which / that) you are carrying is about to come unwrapped. 你拿的包快散了。(which / that在句中作宾语）

1. when指时间，在定语从句中做时间状语
(1) I still remember the day when I first came to the school.
(2) The time