I often listened to him play the violin.为什么listen加ed

这里是说我过去经常听到他拉小提琴。你可能以为often后面的谓语动词一定是一般现在时 其实不是的often只是表示常常、屡次的意思 在什么时态的句子中都可以用e。g。He was often late for school。他上学经常迟到。（以前的事）e。g。He has often appeared on the stages。他经常参加舞台演出。