Question

Who has taught you to play the piano?(voice change )

Answer 1

$\bold{Question :}$

Who has taught you to play the piano?

( Change the voice )

$\bold{Answer :}$

By whom have you been taught to play the piano?

$\bold{RULES :}$

Here, 'who' changes into 'By whom' in passive voice.

The sentence is in Present Perfect Tense. Here, 'has' changes into 'have been' and the sentence being Interrogative one, it takes a new form as seen in the answer.

#$\bold{MarkAsBrainliest}$