In this paper, we consider that on the functional status modal tense adverbs ‘已經’, which was used in the construction “已經V了”, “已經快要V/A了”, “已經NP了”, “已經很A了”. The grammatical meaning expressed by the time adverb “yijing” is multifaceted. In different syntactic structures, the grammatical meaning of the expression can be divided into three types: one is the meaning of the tense expression, the other is the subjective modality function of the expression, and the third is the function of both the meaning and the mood. This research is meaningful in that the cognitive characteristics and functions of the temporal adverb ‘已經’ that cannot be considered in depth with conventional syntax analysis alone have been revealed to the subjectivity of through various analyses on the sides of ‘syntactic, pragmatic, and cognitive’ aspects, subjective quantity and expects to see the difference between “已經NP了” and “都NP了”, “已經很A了” and “已經太A了”.