"Why what happened"is not a complete sentence and cannot be changed into passive voice. A passive voice sentence requires a transitive verb, which is an action verb that can take an object. In this case, "why what happened" is a question and does not contain a transitive verb. Therefore, it cannot be changed into passive voice.
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What happened asked by him
"Why what happened" is not a complete sentence and cannot be changed into passive voice. A passive voice sentence requires a transitive verb, which is an action verb that can take an object. In this case, "why what happened" is a question and does not contain a transitive verb. Therefore, it cannot be changed into passive voice.