Naṣara Class: Doubled and Hamzated Verbs
نوع / بابPastPresentParticipleCommand / lāmProhibition
الصب — معروفصَبَّيَصُبُّصَابٌّصُبَّلَا تَصُبَّ
الصب — مجہولصُبَّيُصَبُّمَصْبُوبٌلِيُصَبَّلَا تُصَبَّ
الأخذ — معروفأَخَذَيَأْخُذُآخِذٌخُذْلَا تَأْخُذْ
الأخذ — مجہولأُخِذَيُؤْخَذُمَأْخُوذٌلِيُؤْخَذْلَا تُؤْخَذْ
صَبَّ illustrates a doubled radical; أَخَذَ has a radical hamzah. Their imperative and prohibition forms cannot be explained by a single weak-letter rule.