如题所述
why did you say that?正确。表示对以前所说话的追问。
Why did you said that是病句,助动词后应该加动词原形。
例句:
1、See, why did you say that to him?
看见没?你为什么要跟他说这些呢?
2、Pourquoi t'as dit ça ? Why did you say that?
为什么你那么说?
3、Lucy: No, why did you say that?
没有啊,为什么这么说?