Question

teacher had punished him for his mistake. ( change the voice)​

Answer 1

Answer:

He was punished by the teacher for his mistake.

Explanation:

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Answer 2

Answer:

$\small\sf\orange{He \: had \: been \: \: punished \: by \: the \: teacher \: for \: his \: mistake.}$

Explanation:

Hope it helps ! !