Antonyms of some:
all of, all, no, few, little, ordinary, slight, known, named, specified.
Examples of usage:
  1. I have done some of them too.
    "The Master of the Inn", Robert Herrick.
  2. Can't you get some friends to come in?
    "Love Stories", Mary Roberts Rinehart.
  3. How much I don't know, but quite some."
    "Richard Dare's Venture", Edward Stratemeyer.