萬一bān-it副詞副詞萬分之一,形容極其微小的機會或事情。萬一伊若知影這件代誌,一定會起性地。Bān-it i nā tsai-iánn tsit kiānn tāi-tsì, it-tīng ē khí-sìng-tē.萬一他知道這件事情,一定會發脾氣的。類義萬不二bān-put-jī/bān-put-lī