do: Base/infinitive; used for present tense apart from with 3rd man or woman singular subjects (other than the singular they ‘Do’ and ‘Does’ may emphasize the validity and assertion of statements. This is particularly practical in responses to doubts or when one particular has to affirm an expression emphatically. https://eternalbookmarks.com/story20181700/helping-the-others-realize-the-advantages-of-does-proleviate-help-with-shoulder-pain