In the phrase "business as usual", is "as" considered an adverb, a conjunction, or a preposition? (Why?)
Wiktionary on "as" as adverb:
- In the manner or role specified.
The kidnappers released him as agreed.
Wiktionary on "as" as conjunction:
- Introducing a basis of comparison, after as, so, or a comparison of equality.
She's twice as strong as I was two years ago.
It's not so complicated as I expected.
Wiktionary on "as" as preposition:
- Introducing a basis of comparison, with an object in the objective case.
You are not as tall as me.
They're big as houses.
As I see the phrase, it's comparing or equating "business" with "usual", which leads me to consider this a conjunction. A friend of mine who I was discussing this with thinks it's more akin to an adverb due to the words it's describing. Maybe it can be considered either or any of these? I'm not a native English speaker and this seems like a grammar technical question that's out of my depth, but I am curious, hence my asking for input here. :)