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Sentence analysis
5Spans
Sentence
Span Details
売上
sales; revenue; takings-> 売り上げnoun
が
subject markergrammar
急に
suddenly; abruptly; quickly; hastily; steeply; sharplyadverb
落ち込ん
feel down; be depressed; be in low spirits; be in a slump; be in an unfavourable condition; fall into (a hole, etc.)-> 落ち込むgodan verb
だ。
past tense or completed action-> たgrammar