对于直言命题的变形推理，传统上认为A命题只能换位为I命题，O命题不能换位。
As for the transformational reasoning of categorical proposition, it is traditionally thought that proposition a can only be replaced by proposition I, proposition o cannot be substituted.
汉语的否定句对应于逻辑上直言否定命题和复合命题中的负命题两种不同类型的命题。
Negative sentences in Chinese are corresponding to two kinds of different propositions in logic. They are categorical negative proposition and the negative proposition of compound proposition.
汉语的否定句对应于逻辑上直言否定命题和复合命题中的负命题两种不同类型的命题。
Negative sentences in Chinese are corresponding to two kinds of different propositions in logic. They are categorical negative proposition and the negative proposition of compound proposition.
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