So often, I find people using am instead of I am, for example,

  • am going to work
  • am okay
  • am sleeping

Is this grammatically correct and when should am be used in a sentence if it is not preceded by I?

  • Am pretty sure this question has been asked before (several times, in fact — look at the related questions there). – RegDwigнt Apr 4 '13 at 8:05