“Dost say” appears in Early Modern dialogue to challenge, confirm, or express surprise (“Dost say he lives?”). It conveys immediacy and personal engagement, fitting dramatic or lyrical exchanges. Its structure maintains period grammar while enabling emotional nuance. Though obsolete, it survives in poetic contexts to preserve the urgency and intimacy of historical speech patterns.

"Dost say" functions as "do you say" in questions, expressing surprise, skepticism, or seeking confirmation. It appears in dialogue, not narrative. The phrase can be rhetorical ("Dost say so?") or genuinely interrogative. Shakespeare uses variations: "What dost thou say?" or "How dost thou say?" The construction reflects the thou-forms' association with intimacy, informality, or lower social status in Early Modern English. By contrast, "Do you say?" uses the more formal "you." Students analyzing dialogue should note that character relationships are encoded in thou/you choices. In poetry, "dost say" appears mainly in dramatic monologues or dialogues imitating earlier periods.