Analyzer
Sentence analysis
13Spans
Sentence
Span Details
この
this; last (couple of years, etc.); these; past; you (as in "you liar")-> 此のpre-noun adjective
研究
research; study; investigationnoun, suru verb
に
direction, time, indirect object, or target markergrammar
は
topic markergrammar
膨大
huge; vast; enormous; extensive; swelling; expansion; expand greatlyna-adjective, noun, suru verb
な
adnominal form of the copula after a na-adjectivegrammar
事前
prior; beforehand; in advance; ex anteno-adjective
の
possession, attribution, nominalizer, or nominal linkergrammar
準備
preparation; arrangements; getting readynoun, suru verb
作業
work; operation; tasknoun, suru verb
が
subject markergrammar
必要
necessary; needed; essential; necessity; need; requirementna-adjective, noun
だった。
past copulagrammar