你说的对，感官动词和使役动词的被动语态都要加 to。先以使役动词make为例，The great news made her feel happy. 这好消息使她很高兴。变被动，she was made to feel happy by the great news.再以感官动词hear为例, I heard her sing in her room a few minutes ago. 几分钟前我听到她在屋里唱歌了。变被动,She was heard to sing in her room a few minutes ago....
