I didn't go home until the concert was over为什么要用didn't 和until呢?

问题描述:

I didn't go home until the concert was over为什么要用didn't 和until呢?

楼上两位解释尚可
不过翻译牵强
应译为:音乐会结束之后我就回家了
虽说not..untill是直到..才 的意思
不过放在句子中不应死译