أوزان الفعل

Learners memorize verbs individually instead of recognizing the form pattern. Once you know Form II doubles the middle letter, you can predict: عَلِمَ (knew) → عَلَّمَ (taught), فَهِمَ (understood) → فَهَّمَ (explained). English speakers: English has no systematic verb derivation. Arabic's form system is like learning 10 'templates' that work on any root — incredibly productive. Russian speakers: Russian uses prefixes for aspect (писать→написать, переписать). Arabic uses internal vowel changes and letter doubling — a different system but similar in productivity. Czech speakers: Czech derives verbs with prefixes (psát→napsat, přepsat). Arabic modifies the internal structure instead — think of it as 'infixes' rather than prefixes.