Analyzer
Sentence analysis
6Spans
Sentence
Span Details
先生
teacher; instructor; master; sensei; title of respect; (teasing) sir; (joking) master; one's eldernoun, noun suffix
に
direction, time, indirect object, or target markergrammar
反省文
written apology; written statement of regretnoun
を
object markergrammar
提出
submission; presentation; filingnoun, suru verb
した。
light/support verb with a noun or noun-like phrase-> するgrammar