如题所述
都可以。
with regard to = in regard to “至于,关于”,是一个介词短语,和后面的宾语一起构成介宾短语,所以它既可以用作后置定语,也可以用作状语。
如:Don't ask me anything with regard to my privacy. 后置定语
With regard to my opinion, I can only say "No comment!". 状语