A：I failed the exam because I didn't study.
我因为不用功所以考试不及格。
B：Serves you right.
你活该。
注释：
表示“活该”时，有下列常用语：
It serves/served you right.
= Serves/Served you right.
= You asked for it.
= You deserve/deserved it.
(你活该。)
例: Dan had always been rude to his girlfriend, so she finally left him.
(托尼：阿丹对她的女友一直很粗鲁，所以她最后离开了他。)
Sally: It served him right.
(莎莉：他活该。)