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.