Analyzer
Sentence analysis
10Spans
Sentence
Span Details
彼
he; him; boyfriendpronoun
は
topic markergrammar
労を惜しまず、
sparing no effort; taking pains to doexpression
毎日
every day; dailynoun, adverb
遅く
late; slowlyadverb, noun
まで
until; as far asgrammar
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