Analyzer
Sentence analysis
7Spans
Sentence
Span Details
彼
he; him; boyfriendpronoun
は
topic markergrammar
日本史
Japanese history; history of Japannoun
に
direction, time, indirect object, or target markergrammar
精通
well-versed; thoroughly knowledgeable; expert; first ejaculation; spermarche; semenarchenoun, suru verb
し
light/support verb with a noun or noun-like phrase-> するgrammar
ている。
ongoing or resultant stategrammar