Lam: feminine third-person paradigm

Negating the Imperfect with Lan and Lam: Subjunctive, Jussive and Full Paradigms

Lam: active | passive

FormActivePassive
Third-person fem. singularلَمْ تَفْعَلْلَمْ تُفْعَلْ
Third-person fem. dualلَمْ تَفْعَلَالَمْ تُفْعَلَا
Third-person fem. pluralلَمْ يَفْعَلْنَلَمْ يُفْعَلْنَ

The feminine singular is لَمْ تَفْعَلْ, while the feminine dual is لَمْ تَفْعَلَا. The feminine-plural nūn remains unchanged.
لَمْ يَفْعَلْنَ — those women did not do.
لَمْ يُفْعَلْنَ — it was not done to those women.
The visible shape تَفْعَلْ can be either third-person feminine singular or second-person masculine singular; context settles the reading.