What is the prominent function of fāʾ in the time-and-preservation example?

Supplementary Practice 3: Rhetorical Judgment, Contextual Evidence and Combined Devices

• Fāʾ simply joins two independent equal reports
• Moving from the first judgment to its practical consequence
• Fāʾ introduces a verbal paraphrase of the first clause
• Fāʾ makes the latter clause a circumstantial state