1. Introduction

This article introduces the phenomenon of root sentences and their asymmetry in syntactic structure transformation and subjective attitude expression of speakers, points out the existence of embedded root sentence phenomena, and discusses the widespread attention to root sentence phenomena in academia and the shortcomings of Chinese language research. At the same time, this article proposes to explore the influence of discourse hierarchy on the phenomenon of root sentences, the causes of embedded root sentence phenomena, and the structural relationships revealed by root sentence phenomena.

2. Literature Review: Explanation of Interface Attributes Based on Root Sentence Phenomenon

Deeply explored the multidimensional explanation of the root sentence phenomenon, including semantic, pragmatic, and syntactic levels. Hooper u0026 Thompson (1973) linked the phenomenon of root sentences with the concept of assertions, stating that assertions are the core meaning of sentences, but the lack of a clear definition of the concept of assertions leads to circular problems in argumentation. They also classified object clause verbs into five categories based on their predicate and predicate properties, and discussed the differences in predicate properties between cognitive mode verbs and affective verbs. Green (1976) believes that the root sentence phenomenon is a pragmatic phenomenon that is unrelated to syntax, emphasizing the influence of the speaker's attitude on the root sentence phenomenon, but ignoring the importance of syntactic factors. At the syntactic level, scholars have proposed two analytical methods: the "truncation theory" and the "intervention theory". The truncation theory suggests that the poverty of sentence structure prevents root sentence conversion, while the intervention theory suggests that operator shift triggers the intervention effect, hindering root sentence conversion. These two analysis methods each have their own advantages, but there are also problems, such as the truncation theory not being able to cover all language facts, and the intervention theory not being detailed enough in classifying features. Overall, the root sentence phenomenon is a complex phenomenon involving multiple interfaces of syntax, semantics, and pragmatics, which requires comprehensive consideration of various factors in order to gain a deeper understanding of its essential properties.

3. Analysis of this article

The analysis section first explores the decisive factors of the root clause phenomenon in object clauses. Research has found that the lexical semantics of the root verb, the left edge structure of the object clause, and the person choice of the subject in the main clause have a significant impact on the root phenomenon of the object clause. For example, the acceptability of argument prepositions in object clauses is different for assertive verbs and non assertive verbs, and the person change of the subject in the main clause can affect the acceptability of the final particles at the end of the sentence. In addition, the existence of discourse hierarchy is considered to be the root of the root sentence phenomenon, where the structural layer of the speaker and the listener - Discourse Phrase (DiscP) - is located on the left edge of the main sentence and directly dominates the entire sentence CP. Speakers in the discourse hierarchy can directly implement discourse behavior by using attitude adverbs, final mood particles, etc., or activate the functional hierarchy of the CP level, such as questions, topics, focal points, etc., thereby driving structural transformation and achieving the root sentence phenomenon.

4. Root sentence phenomenon - a means of identifying parallelism and subordination

Explored in depth the role of root sentence phenomenon in identifying parallel and subordinate structures. By analyzing the relative clauses in English and Chinese, restrictive and non restrictive relative clauses are distinguished, and it is pointed out that non restrictive relative clauses can be independent sentences with root sentence properties. The text demonstrates the interrogative, exclamatory, and imperative language power of non restrictive relative clauses, as well as their parallel relationship with the main clause, through specific example sentences. At the same time, the identification of restrictive and non restrictive relative clauses in modern Chinese was discussed, and the root sentence phenomenon was proposed as one of the identification methods. In addition, the reason for the low frequency of use of non restrictive relative clauses in modern Chinese was analyzed, which may be related to the fact that all attributive clauses are located before the core noun, which increases the short-term memory burden of VO combinations and limits the length and complexity of relative clauses.

5. Conclusion

We studied the root sentence effect in modern Chinese object clauses and found that it is influenced by the semantics of the main verb, the left edge structure of the sentence, and the subject's person. The root sentence phenomenon is closely related to discourse hierarchy, which is located on the left edge of the sentence and affects CP, reflecting the interaction between the speaker and the listener. At the level of the main clause, the speaker can engage in discourse behavior to stimulate the root sentence phenomenon; At the subordinate clause level, the virtual speaker shares a perspective with the subject of the main clause, and empathy affects the acceptability of the root clause phenomenon in the object clause. The root sentence phenomenon can be used as a formal means to determine the parallel or subordinate relationships within complex sentence structures.