Evidentiality Of Thai Spoken Verb [wa:⁵¹]

People often use a series of markers in their daily communication,including morphological markers and lexical markers to express what they say is"reasonable."And"reasonable evidence"has its own special category in linguistics-the meaning of the"evidentials"?evidentials/evidential markers?.In addition,the theoretical study of the category of evidentials can not only understand more important parts of the language itself,but also understand the correspondence between people's cognitive laws and linguistic rules.The research goal of this paper is to outline the function of evidential one of the Thai saying verb[wa:⁵¹].The first chapter of the thesis first summarizes the researches on the linguistic communication categories of predecessors at home and abroad,summarizes its main theoretical framework and the classification methods of various communication tokens.Based on the actual situation of Thai,this paper proposes the understanding of the Thai communication category.The classification of Thai-language letters.[wa:⁵¹]in Thai is initially a verb,and the evidential marker we want to study is an no real meaning mark,so the second chapter of this article will analyze the grammaticalization process begins of Thai saying verb[wa:⁵¹]with an analysis of all the uses of its existence today,including vocabulary,first retaining its"speech"semantics,followed by the beginning of the use of leading clauses,and can be combined with multiple types of semantic verbs,as for the syntactic functions the grammaticalized[wa:⁵¹]is closely related to the guided clause and the position in the sentence has also changed.The third chapter and the fourth chapter will analyze the different evidentials functions of the grammaticalized[wa:⁵¹]as a quotation marker or comlementizer and its special usage with[t^hi:⁵¹],it is considered that not all grammaticalized[wa:⁵¹]are all have evidentials functions,but verbs or specific structures that need specific semantics.To achieve the ultimate goal of this paper,we will reveal its evidentials usage by describing the grammaticalization process of the Thai verb[wa:⁵¹].