the man is often heard ___ the violin in the park
问题描述：
the man is often heard ___ the violin in the park
A.to play B.played C.to playing D.plays
答
答案选A.to play 主动语态中,hear只能接不带to的不定式或动名词作宾语即：hear sb do sthI heard her sing that song.我听见过她唱那首歌.hear sb doing sthI heard her singing that song.我听见她在唱那首歌.但是,...请问什么时候用hear doing什么时候用hear do？如果是hear doing 的被动语态，就不存在还原to的问题了吧？