as 是引导方式状语从句还是比较状语从句?

as 是引导方式状语从句还是比较状语从句?
as引导方式状语从句,意为“如”,“像”,“按照……的方式”.如:
1).I want you to tell my friend your very interesting experience exactly as you have told it to me.
但美国现代语料库中有这样两句：
2）.I looked at the shells very closely and rendered what I was seeing as exactly as I could.
3).He’s going to try to play fast and play all the notes as exactly as he can..
(COCA)
请问1)句中的exactly as 与2）、3）句中的as exactly as 的as用法有何区别?
2)3)句中是引导方式状语从句还是比较状语从句?（用于“as...as...或not so/ as...as...”中,前一个as是副词,后一个as是连词,意为 “如(不如)…一样”.如:
(1).You hate her as much as I (=as I hate her).）
(2).I don't speak English so/ as well as he does.

1)句中的exactly as 与2）、3）句中的as exactly as 的as用法有何区别?
exactly as中的 as和 exactly 没有关系,exactly 后置修饰tell ,as 在这里是就像的意思
as exactly as 中的as...as...是固定搭配,具体意思取决于内容,下边是是举例说明：
例如 as exactly as I could 意为 尽我所能的确切
as fast as i can 意为 尽我所能的快
as well as he does 意为 像他做的一样好
对于你的最后一个问题
如as或 as if 表示 就像 的意思,为引导方式状语从句
如果as...as...表示的的 ：像.一样 的意思（这里特别注意 一样）,就是引导比较状语从句
其实形式不重要,重点是理解语义,你只要知道它做的是状语成分就好,