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ThegirlisoftenheardthisEnglishsonginherroom.为什么用tosing

题目详情
The girl is often heard ______ this English song in her room.
为什么用to sing
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答案和解析
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