Abstract: There are two patterns of mo after the word jiao. One is the pattern of “jiao+subject+mo”, where mo can replace a predicate verb, or a predicate verb plus its object or its compound sentence, and the other is the pattern of “jiao+mo”, in which mo can replace a subject, a predicate verb and an object. Without jiao, mo is devoid of its replacement function. If mo is complemented by a part of the replacing object, the content of replacement will be changed. If the complement is the whole of the replacement, mo thereby becomes a modal auxiliary used for emphasis. The special pronoun mo in Huanggang dialect is a succession and development of the indefinite pronoun mo in ancient Chinese.

Key words: Tuanfeng dialect, special pronoun, mo