记得小萍初见，两重心字罗衣。
译：I can still remember the first time that I met Xiaoping, who wore a silk dress with two heart shapes.
在表达中，用到定语从句的地方太多了。
上文讲了关系代词who, whom, whose, which和that的用法。本文先复习，再讲关系副词。首先先复习一下关系代词和关系副词的区别。
关系代词和关系副词
区别首先是代词和副词的区别。
前面加了关系二字，很多人便忘了它们的本来面目。
代词：起代替作用，如he代指男性。关系代词指代先行词。例如，
He is the man who wants to meet you.
他就是想见你的那个人。
关系词who指代the man。
He is the man,
The man wants to meet you.
把the man改为who，就成了定语从句。
副词：修饰动作的词。例如 I love you very much. Very much 作为副词修饰love这个动词的程度。
最常见的关系副词 when, where, why修饰了动作发生的时间、地点和原因。
例句：
Spring festival is a special day of the year when Chinese people celebrate the beginning of a new year.
春节是特殊的一天，在这一天中国人庆祝新的一年的开始。
关系代词的用法
涉及到关系代词（也就是修饰人或物）的定语从句的写法，就是合并句子。让被修饰的那个词在第二个句子里用关系代词替代就好。
that
I have applied for this position. 我已经申请了这个职位。
This position is important for my development. 这个职位对我的发展很重要。
合并：I have applied for the position that is important for my development. 我申请了那个对我的发展很重要的职位。
which
I am passing by the house. 我正在经过那间房子。
You told me about the house yesterday. 你昨天告诉过我那间房子。
合并： I am passing by the house that you told me about yesterday. 我正在经过你昨天告诉过我的那间房子。
who
He was the man.
The man did most of the drinking.
合并：He was the man who did most of the drinking. 他就是把大部分酒都喝了的那个人。
whom
She is the girl.
I spoke to the girl yesterday.
合并：She is the girl whom I spoke to yesterday. 她就是昨天和我说话的女孩。
whose
I will speak to a man.
I take his suggestions seriously.
·合并： I will speak to a man whose suggestions I take seriously. 我会和一个人交流，他的意见我十分重视。
关系副词的用法
从句缺成分的时候，用关系代词；不缺，用关系副词。
常见的关系副词有三：when，where，why。
when
先行词是时间名词，用when。
I will never forget the day when we first met.
我永远忘不了我们初见的那天。
这种含情脉脉的句子，女孩们听了会动心。
和关系代词引导的定语从句一样，关系副词定语从句也是两个句子拼接而成。
例如上句就是下面两个简单句的拼接：
I will never forget the day.
We first met each other on that day.
其它例句：
We are very busy. Tomorrow is the only day when I can relax this month.
我们很忙。每天是这个月我可以休的唯一的一天。
He is a genius. He was 15 when he was admitted by Tsinghua.
他是个天才。当他被清华大学录取的时候，他才15岁。
不是先行词是时间就一定可以用when。可用when的前提是从句不缺成分，也就是when指代的成分在从句中是副词。如果从句缺的是主语或宾语，则不可用when。例如下句：
