Tasahhara: root s-ḥ-r, Form V, perfect third-person masculine singular.
Afṭara: root f-ṭ-r, Form IV, perfect third-person masculine singular.
Tabayyana: root b-y-n, Form V, perfect third-person masculine singular.
Yaẓunnu: root ẓ-n-n, Form I, imperfect third-person masculine singular.
The forms support the chronology of supposition, action, and eventual discovery.