Meet me at the same place as you did yesterday.

这个句子中，as 是关系副词，在从句中作地点状语，引导的是定语从句。

Meet me at the same place as you did yesterday.

=Meet me at the same place at which you did (did=met me) yesterday

=Meet me at the same place where you did (did=met me) yesterday(where=at which, which=the same place)

这个句子中，as是什么词类？在从句中作什么成分？引导的是什么从句？

基本上同意刘老师观点

(1)you did=you met me

(2)as为关系副词在定语从句作地点状语相当于(at which)，先行词为the same place(which=the same place)

备注: 如果把at the same place当作先行词理解，根据定语从句是用来修饰先行词的，即定语从句就成了是修饰介词短语了，这与定语从句是用来修饰/限定词“名词/代词”定义和观点发生冲突而产生矛盾。因此只能把名词the same place当作先行词来进行理解。这里关系副词as=where=at which

Meet me at the same place as you did yesterday.

观点(1)as you did修饰先行词"the same place"

(as为关系副词=介词+关系代词which）

观点(2)as you did yesterday修饰先行词"at the same place:

（as为关系副词=代替介词短语at the same place)

(备注：as当作关系副词使用时，其语法功能相当于where）

矛盾焦点为：

在定语从句中作状语的关系副词通常用来代替“介词+关系代词” 关系代词就是前面的表示“时间/地点”的名词

在定语从句：关系副词是不能直接用来代词“一个表示时间和地点的介词短语”

This is the house where he lived ten years ago.

=This is the house in which he lived ten years ago.

(where=in+ which, 关系代词which代替先行词 the house)

He saw a snake in the house where he lived ten years go.

=Where he lived ten years ago定语从句是用来修饰the house，不是用来修饰“介词短语in the house.“