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Sentence analysis
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Sentence
Span Details
先生
teacher; instructor; master; sensei; title of respect; (teasing) sir; (joking) master; one's eldernoun, noun suffix
の
possession, attribution, nominalizer, or nominal linkergrammar
黒い
black; dark; blackish; sun-tanned; suspicious; illicit; criminal; sooty; blackened with dirt; covered in grime; evil; wicked; black-hearted; inauspicious; ill-boding; unluckyi-adjective
目が光っ
keep a sharp eye on; monitor closely-> 目が光るexpression, verb
ている。
ongoing or resultant stategrammar