Dost thou alone sojourn? (συ μονος παροικεισ;). Μονος is predicate adjective. "Hast thou been dwelling alone (all by thyself)?"

And not know? (κα ουκ εγνωσ;). Second aorist active indicative and difficult to put into English as the aorist often is. The verb παροικεω means to dwell beside one, then as a stranger like παροικο (Ephesians 2:19). In Jerusalem everybody was talking about Jesus.