listened是動詞的過去式，所以他的原型只需要去掉ed就行了,listen

1.listen就是動詞原形。它的過去式和過去分詞都是listened.

2.We often listen to music on the weekend.通常考點：Listen,they are singing English songs.

3.We listened to the English songs last night.Did you listen to the English songs last night.

原形-----------過去式

listen-------------listened

例句

I listened to music yesterday .

我昨天聽音樂了。