What does the word as mean?

Usage examples for as

  1. One could never see anything as it really was." – The Motor Maids by Palm and Pine by Katherine Stokes
  2. She can't be in love with me, as I never saw her before. – The Secret Passage by Fergus Hume
  3. I'm as good as her and better. – Every Soul Hath Its Song by Fannie Hurst