The research is devoted to the description of the properties and features of using the preposition "zai" in modern Chinese and is based on the predicational model theory of the language, as well as the theory of positional morphology. The article considers the preposition as a position of a verb / secondary verb in a sentence with a topic-comment structure, presents the characteristics of the main positions of the preposition "zai" inside the predication chain, the "(from) -participative" "topic", pre-verb position as the position of the beginning of the sentence, the "(from) -participative" "subtopic", the preverb position,as the position between the topic and the main verb, and the "affixal" position, as the postposition to the main verb are named. The paper addresses the problems of the functions of each of the positions of the preposition in the sentence.
这项研究致力于描述现代汉语中使用介词“在”的特征，该研究基于语言的谓词模型理论以及位置形态学理论。本文将介词视为具有主题注释结构的句子中的动词/次要动词的位置，介绍了介词“在”在介词链中的主要位置的特征，即“（从）副动词”。 “ 话题”，动词前位置作为句子开头的位置，“（从）副动词”“亚话题“，前动词位置，作为话题和主要动词之间的位置，以及”后缀“位置，作为主要动词的后置位置。本文讨论了句子中介词每个位置的功能问题。