Question

You did a wrong voice change​

Answer 1

Answer:

The answer will be: “A mistake has been made by him”. Cz if you have to convert a sentence to passive voice from active voice and the sentence is written in present perfect tense, you have to just follow the regular rules of converting a active voice into a passive one but keeping the thing in mind that the partciple form of the ‘be’ verb i.e ‘been’ will be added after has/have(in this case its ‘has’

Answer 2

To change an active voice sentence to a passive voice sentence: Make the object of the active sentence into the subject of the passive sentence. Use the verb “to be” in the same tense as the main verb of the active sentence. Use the past participle of the main verb of the active sentence.