Question

he was punished for his misconduct change the voice ​

Answer 1

Given sentence:
He was punished for his misconduct.

Sentence after changing voice:
They punished him for his misconduct.

Additional information:
Active voice - A type of sentence where in the subject of the sentence precede the object of the sentence.

Passive voice - A type of sentence wherein the object of the sentence precede the subject of the sentence.

Answer 2

The given sentence will be converted into active voice in the following manner:  

The teacher punished him for his misconduct.

Explanation

This is a subject implied case. A subject implied sentence in active-passive voice is a sentence that is passive but the subject is missing. While converting it into active we have to provide the subject from our side. This sentence is already passive. So we will provide the subject ‘We’ from our side.