Question

my father is doing some research work change into past perfect​

Answer 1

$\huge\underline\mathrm{Heyaa}$

Tense :-

Past perfect :

Rule → (Subject + Had + 3rd form of verb + Object)

Sentence : My father had done some research.

Thank You!!

Answer 2

Explanation:

Tense :-

Past perfect :

Rule → (Subject + Had + 3rd form of verb + Object)

Sentence : My father had done some research.