This paper makes a detailed description and analysis of the syntactic function and semantic orientation of “Ba+O+V”, and draws the following conclusions: a. “Ba+O+V” has various syntactic functions. Besides being a predicate to form the Ba Sentence, it can also be a subject, an object, a prepositional object, an attribute, a complement, etc. In addition, it can also form the De phrase with De, and form the location phrase with some location words. It presents different structural features in different syntactic positions. b. “Ba+O+V” is the most free when it acts as predicate, and is more or less limited in structure when it is used as other syntactic components，so the frequency of it in different syntactic positions is different. c. Because “Ba+O+V” can appear in different syntactic positions in the sentence, it can be semantically related to different components in the sentenc e，showing the diversity of its semantic direction. d. In teaching Chinese as a foreign language, we can’t just limit ourselves to the teaching of Ba sentence with “Ba+O+V” as the predicate. In order to improve students’ overall understanding of the function of “Ba+O+V”, we should also pay attention to the explanation of the usage of it in the non predicate position, so as to effectively improve their practical application ability.

The adverb “Jianzhi” is used frequently in modern Chinese, but most of its previous research focused on “subjectiveness”. To break through this limitation, this paper focused on the syntactic features and main semantic functions of the adverb “Jianzhi”. Firstly, in syntactic features, by organizing the structure with high frequency of “Jianzhi”, it is found that the common feature presented in the verb structure is to pay attention to the characteristics of the nature of the things, and in the adjective structure is to show that mainly modifies the high degree of complements. Secondly, we found that “Jianzhi” has two main semantic functions. The first one is “non-true value marking function” and the other one is “boundary function”. The former means the speaker reminds the listener that the central meaning in the “Jianzhi” sentence is not true, and the latter means when “Jianzhi” is modifying the degree component, it will set a boundary for the component, indicating the degree limit. The commonality of these two semantic functions is [+ default], so the main semantics of “Jianzhi” can be summarized as a temporary default to reach a certain amount or form a certain result, situation.

Systemic Functional linguistics considers Modality as the speaker’s attitude betwe en “yes” and “no”. Based on this, we discuss the Chinese modality system. First, we review what has been done on Chinese modals by the previous researchers. Then, we introduce Halliday’s modality system in English to establish a Chinese modality system and analyze the syntactic and semantic features of the typical modal verbs to point out the negotiation of Chinese modality.