passive voice

There are two ways to change the sentence to passive voice.

1. It is said that many people have been involved in the case.

"It" is a generic subject, which means "it" is not referring to any particular noun.

2. Many people are said to have been involved in the case.
(have, not had)


點解have been 唔洗改嘅
"Involved" is an adjective in the sentence, not a verb.

Your answer is wrong.
Correct one: Many peope are said to have been involved in the case.

:D