speak too soon
过早地发表意见或断定；言之过早
口语·提醒不要过早断言
英文释义
to make a premature statement or prediction that turns out to be incorrect or premature
例句
I said the party was boring, but I spoke too soon—the band just started playing.
典故来源
源自日常经验，过早下结论后情况变化，强调预测或评论时机不当。