假使ká-sú連詞、介詞連詞假如、如果。假使若落雨,我就無愛去。Ká-sú nā lo̍h-hōo, guá tō bô ài khì.如果下雨,我就不去了。類義若是nā-sī若準nā-tsún設使siat-sú準講tsún-kóng甲若kah-nā若甲nā-kah