Analyzer
Sentence analysis
7Spans
Sentence
Span Details
彼
he; him; boyfriendpronoun
は
topic markergrammar
粘り強く
tenacious; persevering; persistent; sticky; viscous-> 粘り強いi-adjective
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