ExpressionFunctionIncorrect inference
إِنْ جِئْتَنِي أَكْرَمْتُكَMake honoring depend on comingPast morphology proves past occurrence
زَيْدٌ وَإِنْ كَثُرَ مَالُهُ بَخِيلٌContrast wealth with continued miserlinessWealth is the cause of miserliness
وَإِنْ كُنْتُمْ فِي رَيْبٍFrame the hearer's doubt as premise for a challengeThe speaker is uncertain about the audience
The same particle can contribute to different rhetorical relations. Context and communicative purpose determine whether the main force is ordinary conditional dependence, concession, or argumentative framing.