Question

لَتَفْعَلاَنِّ Active مَبْنِي  stateless – لَ (laam of emphasis) causes word to become stateless

Accepted Answer

Verily they (D/F) will do! / Verily you (D/M) will do! / Verily you (D/F) will do! لَ at start and نّ   at end makes it emphatic and turns it into future tense.

Front	لَتَفْعَلاَنِّ
Back	Verily they (D/F) will do! / Verily you (D/M) will do! / Verily you (D/F) will do!
Back2	Active
Back3	لَ at start and نّ at end makes it emphatic and turns it into future tense.
Back4	مَبْنِي stateless – لَ (laam of emphasis) causes word to become stateless

Verily D/F لَ Stateless لَتَفْعَلاَنِّ D/M Active Start