SHE WAS HEARD TO PLAY THE PIANO IN HER ROOM LAST NIGHT,搞不懂啊

题目

SHE WAS HEARD TO PLAY THE PIANO IN HER ROOM LAST NIGHT,搞不懂啊
SHE WAS HEARD TO PLAY THE PIANO IN HER ROOM LAST NIGHT 分析下这个句子啊 不太懂 为什么用heard to

答案

有人听说她昨晚在她房间里弹钢琴.
这句话用主动语态表述就是：
Someone heard her play the piano in her room last night.
hear sb do sth （听到某人做某事）这个结构中,hear是感官动词,后面的宾语补足语要用 原形,尽管它是过去的动作.这种结构的句子变为被动语态后,宾补就不能再用动词原形了,要加上to：
She was heard to play the piano in her room last night.