Lan Divides the 14 Forms into Three Groups

Rule of Emphatic Negation in Future with "Lan" (لَنْ)

When لَنْ enters the 14-form Mudhaari' grid, the forms react in three different ways:

What happensNumber of forms
final Dhammah changes to Fathah5
Noon-e-I'raabi drops7
form remains unchanged2

Check: 5 + 7 + 2 = 14.