Analyzer
Sentence analysis
8Spans
Sentence
Span Details
彼
he; him; boyfriendpronoun
は
topic markergrammar
長年
many years; a long timenoun, adverb
の
possession, attribution, nominalizer, or nominal linkergrammar
研究
research; study; investigationnoun, suru verb
を
object markergrammar
成業
completion of work; accomplishment of a tasknoun, suru verb
した。
light/support verb with a noun or noun-like phrase-> するgrammar