i heard her singing.i heard her sing.有什么不同啊?

i heard her singing.i heard her sing.有什么不同啊? 是I heard her singing对还是I hear her singing对 I‘ve often heard her sing this song.与I often hear her sing t I heard him singing there改被动句是heard singing还是heard to sing i never heard her和i have never heard her两者在翻译上有什么区别 翻译英语被动句 I HEARD HER SING THE SONG JUST NOW SHE WAS HEARD TO I heard her in her room when I passed by. Ato sing I,passed,heard,her,when,I,singing,by.(连词成句） I heard her ＿（sing） in the next room when I came back. ）题 改为被动语态 I saw your teacher come.I heard her sister sing a I heard she was singing in the next room then.(同义词) I__ her I heard her singing in the next room ___ ___ ___ ___in the n