"She walks most gracefully." Means she walks identical gracefully. "She walks the most gracefully." She is compared to other masses. The variants of 3 including "not" just commute the issue from buying to not buying, but are other than the same, and the Saame options are usable. "Ever" means "of all time", only the claim substance changes with the strain. In your object lesson "experienced" is the past tense strain of the verb to experience, non describing someone as having undergo of somethi...