Question

The headmaster has written a letter to my father change into passive voice

Answer 1

⭐⭐Thanks for asking⭐⭐

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here is your answer ⤵⤵⤵⤵⤵
here the verb is "has written" . so , it will be has/have been written
and in the interchange
we have to take "a letter"as subject
and" the headmaster" is the object of it .to my father will not changed it is the other besides subject + has/have written +object +rear(to my father)

answer ⭐⭐⭐

$a \: letter \: has \: been \: written \: to \: \\ my \: father \: by \: the \: headmaster$

✨✨hope it helps✨✨

Answer 2

The headmaster has written a letter to my father change into passive voice is :-

A letter has been written to my father by the headmaster.

#SPJ2