Active feminine third-person positions with the heavy emphatic nūn are:
Word / formMeaning / explanation
لَتَفْعَلَنَّthird feminine singular
لَتَفْعَلَانِّthird feminine dual
لَيَفْعَلْنَانِّthird feminine plural
They mean, respectively: she will certainly do, the two women will certainly do, and the women will certainly do. The feminine plural here begins with yāʾ, unlike the feminine singular and dual forms that begin with tāʾ. The feminine plural additionally preserves the feminine nūn and inserts alif fāṣil before the doubled emphatic nūn.