Previously tense, the verb “do” changes to “did” for all subjects. On the other hand, “does” remains unchanged while in the 3rd-individual singular current tense. Here are some illustrations: “Do” is often a useful and multipurpose verb, nevertheless it has its limits—stay clear of applying it with modal verbs https://rowanfzrla.wikiitemization.com/5290914/does_proleviate_help_with_shoulder_pain_an_overview