Second Group: Remove the Inflectional Nun

Mudari Takhfif and Lan

Keep the dual/plural or feminine marker; remove only the final inflectional nūn.

Ordinary imperfect
Mudari Takhfif
what was removed

يَفْعَلَانِ
يَفْعَلَا
inflectional nūn

تَفْعَلَانِ
تَفْعَلَا
inflectional nūn

يَفْعَلُونَ
يَفْعَلُوا
inflectional nūn

تَفْعَلُونَ
تَفْعَلُوا
inflectional nūn

تَفْعَلِينَ
تَفْعَلِي
inflectional nūn

For example, يَكْتُبُونَ becomes لَنْ يَكْتُبُوا. The wāw still marks masculine plural; the final nūn is gone.