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Sentence analysis
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Sentence
Span Details
軽々
indiscreetly; thoughtlessly; carelessly; frivolouslyadverb
に
adverbial form after a na-adjectivegrammar
約束
promise; agreement; one's word; contract; appointment; engagement; date; convention; rule; destiny; fatenoun, suru verb
し
light/support verb with a noun or noun-like phrase-> するgrammar
てはいけない。
must not; may notgrammar