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Sentence analysis
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Sentence
Span Details
お世話になった
be looked after; receive help; be taken care of; become indebted-> お世話になるexpression, verb
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
礼状
letter of thanks; acknowledgment notenoun
を
object markergrammar
書い
write; compose; pen; draw; paint-> 書くgodan verb
た。
past tense or completed actiongrammar