pay sb back for sth

• 向 ... 报复，以牙还牙

pay sb back for sth的用法和样例：

例句

1. I would pay him back for his treacheries.
   对他的背信弃义我要报复。
2. I'll pay him back for what he did to me!
   他对我干的那些事，我会回敬他的。