We heard her singing the popular English song in the next room just now.由主动语态变成被动语态:____ ____ ____ singing the popular English song in the next room just now.

问题描述:

We heard her singing the popular English song in the next room just now.
由主动语态变成被动语态:____ ____ ____ singing the popular English song in the next room just now.

She was heard

The girl were often heard to sing the English song in the next room

She was heard singing the popular English song in the next room just now.