医疗器械生产企业召回:一道英语题(2)

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The song was heard _being singing_ ( sing ) all the time.
我不能肯定我的回答,帮我分析一下吧!谢谢了!
每个回答都不一样,我看了都发晕了!

应该是being sung
主语the song 与sing 是被动关系.所以是be sung
听见某人做某事hear sb doing being 所以being

being song

被动语态用过去分词

我觉得应该是:The song was heard _being sung_ ( sing ) all the time.
hear+do 或+doing都可以的,在这里面 因为后面出现了"all the time"是一个经常性的标志,所以我认为应该用进行时表重复性动作,所以填being
因为song 是被人唱的所以应该用被动式 sung(后面省略了by someone)
---Will

The song was heard _to be sung_ ( sing ) all the time.
我认为
虽然有hear sb/sth do/doing 的用法
但当是被动语态时,应该用be heard to do(又因为歌 被唱,所以用be sung)
又如:
Sam was heard to sing at the party last night

应该是being sung