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Sentence analysis
6Spans
Sentence
Span Details
洞窟
cave; cavern; grottonoun
の
possession, attribution, nominalizer, or nominal linkergrammar
奥
inner part; interior; depths; back; inner room; living quarters at the back; recesses of the mind; bottom of one's heart; hidden depthsnoun
まで
until; as far asgrammar
進ん
advance; go forward; move ahead; precede; go ahead; lead; make progress; improve; deepen; heighten; intensify; be fast (clock); be ahead; gain time; do willingly; do of one's own accord-> 進むgodan verb
だ。
past tense or completed action-> たgrammar