"I should have known"

[avarame]

Hello.

Is there a Japanese expression equivalent to the English "I should have known!" ?

Just curious. Doumo! :)

[Elizabeth]

There's probably a more colloquial expression, but the literal translation -- something like "shiru beki deshita" (知るべきでした) -- should be understandable as well.

[avarame]

Thanks, Elizabeth! :)