took matters into my own hands

• v. 自行其是

took matters into my own hands的用法和样例：

例句

用作动词 (v.)

1. We mustn't leave him to his own devices.
   不应听任他去自行其是。
2. It won't do to let a child always have its own way.
   让小孩自行其是是不行的。