"Do" vs. "Does" – What's The Difference? | Thesaurus.com Aug 18, 2022 · Both do and does are used for the present tense. The form does is only used with third person singular subjects, such as the pronouns he , she , and it , as in She does yoga . The form do is used for all other subjects, including for first person ( I and we ) and second person pronouns ( you ) and the third person pronoun they (regardless of whether it’s singular or plural), as in I do yoga, but they do not .