Question

voice change, who taught you English​

Answer 1

Answer:

By whom were you taught English.

Answer 2

Question :-

To change voice :

Who taught you English.

Answer :-

By whom English was taught to you.

Information :-

=> By whom is used to replace "who" while changing voice.

=> "taught" 3rd form of verb is used in changing from active to passive voice.

=> As sentence was in "simple past" we changed it by using "was".