Analyzer
Sentence analysis
9Spans
Sentence
Span Details
彼
he; him; boyfriendpronoun
の
possession, attribution, nominalizer, or nominal linkergrammar
集中力
concentration; ability to concentratenoun
は
topic markergrammar
長く
long (distance, length); long (time); protracted; prolonged-> 長いi-adjective
は
topic markergrammar
保た
keep; maintain; preserve; last; be durable-> 保つgodan verb
なかっ
negative auxiliary-> ないgrammar
た。
past tense or completed actiongrammar