The spelling of "do one parts" is quite straightforward when using the International Phonetic Alphabet (IPA). The word is pronounced as /du wan pɑrts/. The initial sound is a voiced dental fricative, which is followed by a diphthong made up of the sounds /u/ and /a/. The final two sounds are both unvoiced. The first is a labial stop, and the second is an alveolar fricative. Overall, the IPA transcription helps to clearly indicate the correct way to spell this word.