as ＋前置詞 （たいてい全体で副詞句のはず）

as for 〜はどうかと言うと =regarding

- As for me,…

- Yes to the death penalty, but as for a sales-tax increase for education, she says she has "concerns". (Seattle Times, 2004)

as of 〜現在で、〜の時点で =on, up to, from

- Our fax number is changing as of May 12.

as to sth ～に関して

- As to tax, that will be deducted from your salary. - Larsen gave the girl's father specific instructions as to where the ransom was to be left. (Seattle Times, 2004)

as to do

so ~ as to do (〜する)ほど〜

- The question is so obvious as to need no reply. (Collins)