飛(ひ)行(こう)機(き) hikoukiが ga次々(つぎつぎ) tsugitsugiに ni到(とう)着(ちゃく) touchakuした shita。 Airplanes arrived one after another. Literal Airplanes [subject-が] one-after-another [adverbial-に] arrived. 次々に (つぎつぎに) means 'one after another, in succession.' A reduplicative adverb formed from 次 ('next'). The に marks it as an adverb. airplanestransportation
飛(ひ)行(こう)機(き) hikoukiが ga次々(つぎつぎ) tsugitsugiに ni到(とう)着(ちゃく) touchakuした shita。 Airplanes arrived one after another. Literal Airplanes [subject-が] one-after-another [adverbial-に] arrived. 次々に (つぎつぎに) means 'one after another, in succession.' A reduplicative adverb formed from 次 ('next'). The に marks it as an adverb. airplanestransportation