主动语态:he has never heard of such things before

主动语态:he has never heard of such things before Never before have I heard of such things的翻译 改病句 I have never heard such things before. 速度! 这样的事闻所未闻：such a thing has never been heard of before; Never in his life has he heard such a thing we have never heard of such things?怎么改为被动句? He has never been heard _______ ill of others. I've never heard of him before. He has never __of such a thing before.A.hear B.heared C.hear the crow has never heard anyone say such sweet words I have never heard of that before中的have是啥意思?可不可以说成I never he Have you ever heard of such a things?翻译下