因为是感官动词 hear +do 变成的被动语态
主动语态是: We often hear the girl sing the English song.
被动语态: The girl is heard to sing.
这个用法适用于感官动词,还有make
因为是感官动词 hear +do 变成的被动语态
主动语态是: We often hear the girl sing the English song.
被动语态: The girl is heard to sing.
这个用法适用于感官动词,还有make