Question

لِأَفْعَلَنَّ Active Active voice conjugations of the command reflect the person, gender, andplurality of the individual commanded. For example,  لِيَفْعَلُوْا means, “theymust do!”

Accepted Answer

Verily I must do! لِ at start make it into a command. Derived from active form of second person present tense verb in Jazm  جَزْم  and replacing the ta of the second person with a hamza (seated on an alif) and voweling the hamzah with a kasrah. For example, ( تَفْعَلُyou do) becomes ( اِفْعَلْdo!) مَبْنِي  stateless – لِ causes word to become stateless

Front	لِأَفْعَلَنَّ
Back	Verily I must do!
Back2	Active
Back3	لِ at start make it into a command. Derived from active form of second person present tense verb in Jazm جَزْم and replacing the ta of the second person with a hamza (seated on an alif) and voweling the hamzah with a kasrah. For example, ( تَفْعَلُyou do) becomes ( اِفْعَلْdo!)
Back4	Active voice conjugations of the command reflect the person, gender, and plurality of the individual commanded. For example, لِيَفْعَلُوْا means, “they must do!”
Back5	مَبْنِي stateless – لِ causes word to become stateless

Active لِ Person Stateless لِأَفْعَلَنَّ Verily I Start