Person, tense, voice, negation and command are distinct dimensions within this hollow-yāʾ paradigm.
Word / formMeaning / explanation
بَاعَhe sold: active perfect.
بِيعَit was sold: passive perfect.
يَبِيعُونَthey sell: masculine plural imperfect.
لَنْ يُبَاعَit will not be sold: passive subjunctive.
لَمْ يَبِعْhe did not sell: active jussive.
بِعْsell!: second-person imperative.
لَا تَبِعْdo not sell!: prohibition.
مَبِيعٌsomething sold: passive participle.
The lexical root is constant; morphology changes the precise grammatical information communicated.