Here the middle radical carries a ḍammah: يَفْعُلُ. Again, the same 14 slots are used.
Person
Gender
Singular
Dual
Plural
Third person
Masculine
يَفْعُلُ
يَفْعُلَانِ
يَفْعُلُونَ
Third person
Feminine
تَفْعُلُ
تَفْعُلَانِ
يَفْعُلْنَ
Second person
Masculine
تَفْعُلُ
تَفْعُلَانِ
تَفْعُلُونَ
Second person
Feminine
تَفْعُلِينَ
تَفْعُلَانِ
تَفْعُلْنَ
First person
Masculine/Feminine
أَفْعُلُ
—
نَفْعُلُ
Do not memorize 42 unrelated words. Learn one person/number framework, then notice whether the middle radical has fatḥah, kasrah, or ḍammah.