I heard a girl singing in the next room .（句型转换） I_ _ _ _in the net room.
问题描述：
I heard a girl singing in the next room .（句型转换） I_ _ _ _in the net room.
答
hear sb doing 听见某人正在做.
由于谓语动词是heard为动词hear 的过去时,所以该句还可以改为由heard引导的宾语从句.
I heard (that ) a girl was singing in the nest room.