In Past Tense the third person pronouns in Urdu are changed. We don't use "He or She " as "Woh وہ " in Urdu Grammar we say " Us Ne اُس نے ".
This Urdu grammar rule only apply in the past tense
You can call it irregular nouns in Urdu, but actually it change because of oblique case. Oblique case means when a noun comes with a preposition.

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