you can never tell

US /juː kən ˈnev.ər tel/
UK /juː kən ˈnev.ər tel/
"you can never tell" picture
1.

你永遠也說不準, 誰也說不準

used to say that it is impossible to know what will happen or what is true

:
It might rain later, you can never tell.
可能晚些時候會下雨,你永遠也說不準
She said she'd be here, but you can never tell with her.
她說她會來,但你永遠也說不準她。