He is often heard _____ in the next room.

来源：百度知道编辑：UC知道时间：2024/05/25 13:01:06

He is often heard _____ in the next room.
A.singing B.sang C.to singing D.to sing
答案为什么是A?

A.singing

singing在这里作主语补足语，说明主语的。如果把句子变成主动语态就更清楚一些：
People often hear him singing in the next room.（这里singing 作宾语补足语）

B，C很容易排除，D不定式通常表示“即将/尚未”发生的动作，而这里hear和sing这个动作应该是同时发生才合理。

A 动作的主体----他出于主语状态，因此用现代分词。

A正在唱，hear sb.doing

选A ,是强调唱歌这个过程，另外还有一个答案是SING，是强调结果，强调过程动词后面加ING形式，结果的话直接用动词原形。

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