In this study, following conclusions can be gotten as the result of reconsidering the meaning and function of adverb ‘jiu(就)’ through existing researches and BBC Corpus research.
First, ‘jiu’ can be divided into time adverb, evaluation form adverb (speaker judges time, quantity, amount of time etc subjectively), conjunctive adverb, scope adverb, and modality adverb.
Second, adverb ‘jiu’ becomes subjectivization from verb ‘jiu’, and metaphor mechanism is applied in the course. Also, through metaphor characteristics appeared in the grammaticalization process, adverb ‘jiu’ could be deduced as being derived like time adverb ‘jiu’, evaluation form adverb ‘jiu’, adjunctive adverb ‘jiu’, scope adverb ‘jiu’, and modality adverb ‘jiu’ in order.
And, subjectivity strength of ‘jiu’ displays time adverb ‘jiu’ < evaluation form adverb& adjunctive adverb ‘jiu’ < scope adverb& modality adverb ‘jiu’ sequentially. In addition, grammaticalization process of ‘jiu’ shows uni direction instead of being spritted into two categories like quick connection and exclusiveness.
Third, principle meaning contained in time adverb, that is quick connection, is insufficient to explain various aspects meant by remaining adverbs ‘jiu’. Exceeding psychological standard of the speaker which is subjective meaning derived from time adverb ‘jiu’ belongs to basic meanings of several form adverbs ‘jiu’. While degrees of grammaticalization regarding such subjective meaning of ‘jiu’ have been deepened, it has been developed to evaluation foam adverb, conjunctive adverb, scope adverb, and modality adverb respectively.