Analyzer
Sentence analysis
9Spans
Sentence
Span Details
彼
he; him; boyfriendpronoun
は
topic markergrammar
日本史
Japanese history; history of Japannoun
を
object markergrammar
専門
specialty; field of expertise; major; exclusive focus; doing only; specializing solely innoun
に
direction, time, indirect object, or target markergrammar
し
light/support verb with a noun or noun-like phrase-> するgrammar
てい
ongoing or resultant state-> ているgrammar
ます。
polite non-pastgrammar