if and when
成語所屬單字if
if and when — 慣用語
1. Used to refer to a possible future event that may or may not happen.
1.慣用語
釋義
如果且當
Used to refer to a possible future event that may or may not happen.
例句
If and when the package arrives, please call me.
We will discuss the budget if and when the manager returns.