Negative passive imperfect, third-person masculine:
Word / formMeaning / explanation
Singular: لَا يُفْعَلُhe is not / will not be acted upon.
Dual: لَا يُفْعَلَانِthose two men are not / will not be acted upon.
Plural: لَا يُفْعَلُونَthose men are not / will not be acted upon.
Third-person feminine:
Word / formMeaning / explanation
Singular: لَا تُفْعَلُshe is not / will not be acted upon.
Dual: لَا تُفْعَلَانِthose two women are not / will not be acted upon.
Plural: لَا يُفْعَلْنَthose women are not / will not be acted upon.
In all six forms, لَا supplies negation without undoing the passive vowel pattern.