A nominal sentence (الجملة الاسمية) can describe a condition contemporaneous with the main event. Whether the nominal clause contains a pronoun returning to the possessor is important in judging its connection.
Example: “Jāʾa Zaydun wa-huwa masrūrun” — Zayd arrived while he was happy. The pronoun huwa refers to Zayd, and wāw introduces the accompanying state.
Example: “Jāʾa Zaydun wajhuhu mubtasimun” — Zayd came, his face smiling. The suffix pronoun in wajhuhu returns to Zayd. The rhetorical and grammatical link is therefore not identical to the first example. One must identify the actual rābiṭ (رابط), not merely look for wāw.