Analyzer
Sentence analysis
8Spans
Sentence
Span Details
彼
he; him; boyfriendpronoun
は
topic markergrammar
営々黙々
quietly and assiduouslytaru-adjective, adverb
と
quotation, conditional, companion, or and markergrammar
研究
research; study; investigationnoun, suru verb
を
object markergrammar
続け
continue; keep doing; keep up; continue to ...; keep on ...-> 続けるichidan verb, auxiliary
た。
past tense or completed actiongrammar