In the past tense, the verb “do” modifications to “did” for all subjects. However, “does” remains unchanged from the 3rd-man or woman singular current tense. Here are some illustrations: These helping verbs enable for the sign of steps or states of remaining without the repetition of the primary verb. https://manuelnomfz.isblog.net/does-proleviate-help-with-shoulder-pain-an-overview-54303920