Group 2: Seven Forms Lose Noon-e-I'raabi

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

Seven forms contain Noon-e-I'raabi. When لَنْ enters, that Noon drops.
These seven positions are:
• all 4 dual positions
• 2 masculine plural positions
• 1 singular feminine Haadhir position

After LanBefore Lan
لَنْ يَفْعُلَايَفْعُلَانِ
لَنْ يَفْعُلُوايَفْعُلُونَ
لَنْ تَفْعُلِيتَفْعُلِينَ

Memory formula: 4 dual + 2 masculine plural + 1 singular feminine Haadhir = 7.