Seven imperfect positions have an inflectional nūn in the indicative. In the four dual positions it carries kasrah:
Word / formMeaning / explanation
يَفْعَلَانِthird-person masculine dual.
تَفْعَلَانِthird-person feminine dual.
تَفْعَلَانِsecond-person masculine dual.
تَفْعَلَانِsecond-person feminine dual.
In three other positions the nūn carries fatḥah:
Word / formMeaning / explanation
يَفْعَلُونَthird-person masculine plural.
تَفْعَلُونَsecond-person masculine plural.
تَفْعَلِينَsecond-person feminine singular.
The inflectional nūn is retained in these indicative forms; different endings appear when governing particles require subjunctive or jussive forms.