it's no good doing something
成語所屬單字good
it's no good doing something — 慣用語
1. Used to say that a particular action will not produce the desired result and is
1.慣用語
釋義
做某事沒用；做某事毫無意義
Used to say that a particular action will not produce the desired result and is therefore pointless.
例句
It is no good crying over a broken cup — just buy a new one.
It is no good telling Jack to hurry because he never listens.