彼(かの)女(じょ) kanojoは wa病(びょう)気(き) byoukiだった dattaので node、来(こ)ら()れ()な()く() korarenakuなった natta。 She was sick, so she became unable to come. Literal She [topic-は] sick was [because-ので], come-able became-not. 来られなくなった combines the potential (来られる) with ~なくなる ('cease to be able to'), expressing a change to inability. ~ので provides the reason. health~ので (because)~なくなる (cease to)
彼(かの)女(じょ) kanojoは wa病(びょう)気(き) byoukiだった dattaので node、来(こ)ら()れ()な()く() korarenakuなった natta。 She was sick, so she became unable to come. Literal She [topic-は] sick was [because-ので], come-able became-not. 来られなくなった combines the potential (来られる) with ~なくなる ('cease to be able to'), expressing a change to inability. ~ので provides the reason. health~ので (because)~なくなる (cease to)