FunctionExampleDiagnostic idea
SeekingاِسْتَطْعَمْتُهُFood requested from someone
Equivalenceاِسْتَجَابَ وَأَجَابَTwo patterns compared in meaning
Independent usageاِسْتَعَانَA lexical use listed independently
All three belong to Form X, but their textbook classification differs. Seeking focuses on a request; equivalence compares different patterns; independent usage records an established meaning rather than deriving a universal formula.