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Sentence analysis

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Sentence

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Sentence

何なにをにやにやしてるの?

Span Details

what?; huh?; why; for what reason

interjection, adverb

grinning; smirking

-> ニヤニヤadverb

し

light/support verb with a noun or noun-like phrase

-> するgrammar

ongoing or resultant state

-> ているgrammar

possession, attribution, nominalizer, or nominal linker