Moping or Mopping: How To spell?
The word Moping is misspelled against Mopping, which is present continuous of "Mop"
Mopping has double "pp" is mispronounced as "p"Remember double 'PP' in between the strings mo & ing which should not be misspelled with single 'P'
Wrong Spelling:  mo-p-ing  Correct Spelling:  mo-pp-ing 
Find more incorrect spellings of Mopping to spell right way.