I’ve been thinking about the word ‘as’

I never really gave it much thought, until recently. It is such an unassuming word that I hardly even noticed it, but lately it has started to intrude upon me.

Now I’m seeing it everywhere and sometimes it is either wrongly or awkwardly used, or so it seems to me.

Before this started happening, I hadn't considered the subtleties; I simply knew what felt right. Over the last few weeks I’ve been thinking about *why* it feels right, or wrong.

What am I talking about?

The sentence structure – she did something as she did something else. I’m talking about conjunctions.

None of my grammar books have been any help. They tell me what a conjunction is, but they don’t go into detail on each one. So I’m putting it out here, for you to tell me if you think I have a valid point.

I got to thinking about what it was that was bothering me about some usages of ‘as’ that I was seeing.

( I’m thinking aloud here. )

PPS
"The time has come," the Walrus said, "To talk of many things -
of shoes and ships and sealing-wax, of cabbages and kings,
and why the sea is boiling hot, and whether pigs have wings."
~ The Walrus and The Carpenter ~