When interrogative pronoun and negative word appear simultaneously, the former is restrained by syntactic licensor including negative operator.
疑问代词和否定词共现时，前者要受到包括否定算子在内的句法允准语的约束。
They are of similar word class and grammatical form. But their non-interrogative usages differ because of syntactic constraints.
而非疑问用法由于受到不同的句式制约，产生了不同的表达方式。
They are of similar word class and grammatical form. But their non-interrogative usages differ because of syntactic constraints.
而非疑问用法由于受到不同的句式制约，产生了不同的表达方式。
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