Comparing the previous two paradigms with this one highlights the distinction between underlying root and surface form.
PerfectRootImperfectAfter lamActive participle
دَعَاد ع ويَدْعُولَمْ يَدْعُدَاعٍ
رَمَىر م ييَرْمِيلَمْ يَرْمِرَامٍ
رَضِيَر ض ويَرْضَىلَمْ يَرْضَرَاضٍ
دَعَا and رَضِيَ are both ultimately wāw-final but use different vowel patterns. رَمَى is yāʾ-final. Their jussive final vowels reflect different underlying imperfect stems.