Why is the negative imperfect treated separately from the affirmative imperfect?

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

• Because their shared tense necessarily makes their rule identical
• Negation affects the relevant rules governing circumstantial imperfect clauses
• Because negative imperfect clauses are always resumptive
• Because negation affects truth alone, never circumstantial construction