He often _____(hear) ______(sing) in the room

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He often _____(hear) ______(sing) in the room

He often _____(hear) ______(sing) in the room
He often _____(hear) ______(sing) in the room

He often _____(hear) ______(sing) in the room
is heard to sing
最好这样写:
He is often heard to sing in the room.
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答案为hears singing
often表示一般现在时,因此应该是第三人称单数,hears
而hear后面的动词需要加ing形式表示听到正在做什么。所以是singing。

hear singing