do: Base/infinitive; used for current tense other than with third man or woman singular subjects (aside from the singular they ‘Do’ and ‘Does’ might also emphasize the validity and assertion of statements. This is especially helpful in responses to doubts or when a person must affirm an expression emphatically. https://socialwoot.com/story22245627/not-known-factual-statements-about-does-proleviate-help-with-shoulder-pain