do: Foundation/infinitive; useful for present tense except with 3rd particular person singular subjects (apart from the singular they ‘Do’ and ‘Does’ might also emphasize the validity and assertion of statements. This is especially beneficial in responses to doubts or when a person needs to affirm an expression emphatically. Using https://socialrus.com/story21793142/5-simple-statements-about-does-proleviate-help-with-shoulder-pain-explained