As yet

what does as yet mean in this sentences, and why is it used like that there?

The statement also said, “Results indicate that alcohol was present but it cannot be determined as yet if it played a role in her death” (reading about amy winehouse) xD

It cannot be said for certain at this time whether the alcohol played a part in her death.

as yet = at the moment/ at this time /right now.

Later things may become clearer and they will be able to say whether the alcohol played a part or not (after further tests on various organs, etc) but right now, they can’t tell.

So, I think if they had just said “yet” without the “as” it would have had the same meaning, don’t you think?

Results indicate that alcohol was present but it cannot be determined yet if it played a role in her death.

yes

  1. We have not received the documents as yet.
  2. We have not received the documents until now.
    Does #1 mean #2 sentence?
    Please explain.
    Thanks.

Not quite. Sentence 2 implies that you have now received them. Sentence 1 clearly states that you still don’t have them.