سَمِعَ — يَسْمَعُ — سَمْعًا
He heard — he hears — hearing.
Its pattern is فَعِلَ يَفْعَلُ: the second radical has kasrah in the perfect and fatḥah in the imperfect, samiʿa / yasmaʿu.
عَلِمَ يَعْلَمُ — knew / knows.
فَهِمَ يَفْهَمُ — understood / understands.
The kasrah of the perfect distinguishes this class from the perfect forms of naṣara and ḍaraba, both on faʿala.
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Class 3: samiʿa–yasmaʿu
Verb Classes and the Six Unaugmented Triliteral Patterns
سَمِعَ — يَسْمَعُ — سَمْعًا
He heard — he hears — hearing.
Its pattern is فَعِلَ يَفْعَلُ: the second radical has kasrah in the perfect and fatḥah in the imperfect, samiʿa / yasmaʿu.
عَلِمَ يَعْلَمُ — knew / knows.
فَهِمَ يَفْهَمُ — understood / understands.
The kasrah of the perfect distinguishes this class from the perfect forms of naṣara and ḍaraba, both on faʿala.