The ending already present in the imperfect determines what will happen.
Group
Original ending
Change in Mudari Akhaff
Example
First
final dammah
replace dammah with sukun
يَفْعَلُ ← يَفْعَلْ
Second
added final nun
remove the added nun
يَفْعَلُونَ ← يَفْعَلُوا
Third
final nun of feminine plural
no visible change
يَفْعَلْنَ ← يَفْعَلْنَ
This is a genuine three-way comparison: sukun, removal of added nun, or no visible change.
Opening interactive controls...
The ending already present in the imperfect determines what will happen.
Group
Original ending
Change in Mudari Akhaff
Example
First
final dammah
replace dammah with sukun
يَفْعَلُ ← يَفْعَلْ
Second
added final nun
remove the added nun
يَفْعَلُونَ ← يَفْعَلُوا
Third
final nun of feminine plural
no visible change
يَفْعَلْنَ ← يَفْعَلْنَ
This is a genuine three-way comparison: sukun, removal of added nun, or no visible change.