“一定、必须、继续”的词性一直受到关注,但各家在判断这几个词的词类性质时标准不太统一。本文旨在从谓宾动词句法特性的角度出发,尝试性地提出一个区分副词和谓宾动词的辅助性方法。本文结论是:“一定”兼副词和助动词,“必须”是助动词,“继续”兼副词和谓宾动词。 The part of speech of “must, must, continue” has been paid attention, but the standards of each part are not uniform in judging the part of speech of these words. The purpose of this paper is to tentatively propose an auxiliary method of distinguishing between adverbs and predicate verbs from the perspective of the syntactic properties of predicate verbs. The conclusion of this paper is: “must ” with adverbs and auxiliary verbs, “must ” is auxiliary verbs, “continue ” and adverbs and predicate verbs.