The relative pronoun 'as'

I want to revive this thread.

I want to revive this thread again.

'As' is not a relative pronoun.

'It' is the noun 'language'.

Thank you, fivejedjon, for your answer.
I'm very glad It's been a long time from I heard from you.

Can I think #1 like following?
Life as we have known (as what life was), it is over.

park sang joonCan I think #1 like following?Life as we have known (as what life was), it is over.

That makes little sense. The meaning is more like "Life, in the way that we have known life, is over" This rather strange sentence might be said of, for example, a formerly fit and active person who is now lying in a coma from which they will not emerge. Technical

park sang joon1) Life as we have known it is over.2) Language as we know it is a unique human property.In the above sentences, each 'as' is a relative pronoun

'as' is a conjunction here.

Thank you, fivejedjon, for your concrete accounts
I have just stepped a step forward towards the truth of 'as' relative pronoun

Who are you?
In any chance, do you know of 'as' relative pronoun?
Please, could you solve my mystery of 'as' relative pronoun for me?
https://www.EnglishForward.com/English/IDecideAboutConceptRelativePronoun/bhvpgn/post.htm

'As' is never a relative pronoun in standard English.

Thank you, fivejedjon, for your answer.

fivejedjon'As' is never a relative pronoun in standard English.

But we have been taught such 'as's as in my examples is relative pronoun In Korea, but I lost the conviction for some reasons.