Active and Passive: Same Seegah, Different Voice

Conjugating Past Absolute Negation with "Lam" (Active & Passive)

When you move from active to passive, the grammatical person stays the same.

PassiveActivePerson
لَمْ يُفْعَلْلَمْ يَفْعُلْmasculine Ghaa'ib singular
لَمْ تُفْعَلِيْلَمْ تَفْعُلِيْfeminine Haadhir singular
لَمْ أُفْعَلْلَمْ أَفْعُلْMutakallim singular

First identify the Seegah, then decide whether the vowel pattern is active or passive.