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Sentence analysis
6Spans
Sentence
Span Details
嬉しく
happy; glad; pleased; joyful; pleasant; gratifying-> 嬉しいi-adjective
て
connective te-formgrammar
顔中
whole face; all over one's facenoun, adverb
が
subject markergrammar
ほころん
begin to open; come out; smile broadly; break into a smile; come apart at the seams-> 綻ぶgodan verb
だ。
past tense or completed action-> たgrammar