Pasing or Passing: How To spell?
The word Pasing is misspelled against Passing, a noun meaning "The act of one who, or that which, passes; the act of going by or away."
Passing has double "ss" is mispronounced as "s"Remember double 'SS' in between the strings pa & ing which should not be misspelled with single 'S'
Wrong Spelling:  pa-s-ing  Correct Spelling:  pa-ss-ing 
Find more wrongly spelled words of Passing to spell it well.