“Doth” was the standard auxiliary verb in Early Modern English for third-person singular subjects, appearing in Shakespeare, the Bible, and metaphysical poetry. It adds rhythmic emphasis and grammatical correctness to declarations, often heightening emotion or irony (“He doth bestride the narrow world”). Though replaced by “does,” “doth” endures in verse for its musicality and historical authenticity.

Doth is the third-person singular present tense of "do": "he doth," "she doth," "it doth." This follows the same pattern as modern "does." Shakespeare's "The lady doth protest too much" (Hamlet) is perhaps the most famous usage. Students should recognize that doth serves the same grammatical function as modern "does," just archaic. In questions with inversion: "Doth he know?" Pronunciation rhymes with "both" or "oath." In poetry, doth provides metrical variation and archaic coloring. The form was standard through the Renaissance but declined through the 17th-18th centuries. Understanding doth/hath/dost conjugations is essential for reading Early Modern English fluently and appreciating its rhythms.