I don’t know how, why, etc…

成語所屬單字know

I don’t know how, why, etc… — 慣用語

1. Used to criticize someone's behavior by saying you cannot understand it.

1.慣用語
釋義

真不知道……

Used to criticize someone's behavior by saying you cannot understand it.

例句

I don't know how you can eat that spicy food.

I don't know why she would lie about such a small thing.