作业帮She was listened to by us__just now.A.sing B.sang C.sung D.t
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She was listened to by us__just now.A.sing B.sang C.sung D.to sing 请求具体讲解.
选D.被动语态转换成主动形式是We listened to her to sing.
再问： 为何用动词不定式？
再答： 就算是一些主动态没有to的动词变成被动语态的时候也要还原本来被省略的to，比如说主动的：I saw him smoke.变成被动的就是He was seen to smoke.我感觉了一下，这个应该是属于这种情况的，抱歉了，listen to应该和hear一样是加sb do sth.的，虽然读起来感觉有点奇怪。还有比如说make sb do sth变成被动态也是be made to do。
再问： 为何用动词不定式？
再答： 就算是一些主动态没有to的动词变成被动语态的时候也要还原本来被省略的to，比如说主动的：I saw him smoke.变成被动的就是He was seen to smoke.我感觉了一下，这个应该是属于这种情况的，抱歉了，listen to应该和hear一样是加sb do sth.的，虽然读起来感觉有点奇怪。还有比如说make sb do sth变成被动态也是be made to do。
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