In past times tense, the verb “do” changes to “did” for all subjects. Alternatively, “does” stays unchanged in the 3rd-man or woman singular existing tense. Here are some examples: ‘Do’ and ‘Does’ may also emphasize the validity and assertion of statements. This is especially helpful in responses to doubts https://www.proleviate.com/post/is-conolidine-a-real-pain-reliever