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Sentence analysis
9Spans
Sentence
Span Details
この
this; last (couple of years, etc.); these; past; you (as in "you liar")-> 此のpre-noun adjective
海域
sea area; watersnoun
に
direction, time, indirect object, or target markergrammar
は
topic markergrammar
大規模
large-scale; extensive; massivena-adjective, noun
な
adnominal form of the copula after a na-adjectivegrammar
海底油田
offshore oil fieldnoun
が
subject markergrammar
ある。
be; exist; have; possess; there is available; be located; be situated; be equipped with; have as a facility or feature; happen; take place; come about; be in a completed state; be left as done-> 有るgodan verb, auxiliary