بَاعَ — يَبِيعُ — بِعْتُ
Translation: He sold; he sells; I sold.
The root ب ي ع contains yāʾ as its middle radical, so it is a hollow-yāʾ verb. The visible long vowel in بَاعَ is not the full story: inflection also yields بِعْتُ. Identify the root, not just the surface letters.
ItemResult
Rootب ي ع
TypeHollow-yāʾ
Imperfectيَبِيعُ
First-person perfectبِعْتُ