廊(ろう)下(か) roukaは wa大(たい)変(へん) taihen混(こん)雑(ざつ) konzatsuしていた shiteitaので node歩(ある)け()な()か()っ()た() arukenakatta。 The hallway was so crowded I couldn't walk. Literal Hallway [topic-は] very crowded was [because-ので] couldn't-walk. ~ので gives the causal connection. 歩けなかった is the potential negative past of 歩く. Simple cause-and-effect. daily life~ので (because)potential form (~える/~られる)
廊(ろう)下(か) roukaは wa大(たい)変(へん) taihen混(こん)雑(ざつ) konzatsuしていた shiteitaので node歩(ある)け()な()か()っ()た() arukenakatta。 The hallway was so crowded I couldn't walk. Literal Hallway [topic-は] very crowded was [because-ので] couldn't-walk. ~ので gives the causal connection. 歩けなかった is the potential negative past of 歩く. Simple cause-and-effect. daily life~ので (because)potential form (~える/~られる)