take the liberty of doing something
成語所屬單字liberty
take the liberty of doing something — 慣用語
1. To do something without first asking for permission, usually because you believe
1.慣用語
釋義
擅自做某事（通常出於好意）
To do something without first asking for permission, usually because you believe the other person will not mind or because you want to be helpful or polite.
例句
I took the liberty of ordering a taxi for you so you would not have to wait in the rain.
Jack took the liberty of reserving a table by the window for the dinner celebration.