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在系统功能语法中,情态表达说话人对所说话语的可能性与必要性的判断。经常性把说话人的判断体现为时间上的不确定性,属于时间范畴,在功能语法中不应当视为情态类型。经常性可以作为评价的级差资源,从时间频率角度限定说话人的评价意义。在系统功能语法中,情态助动词和副词表达说话人的主观观点、态度,在语义上均具备主观性特征;句法上同属于小句的语气结构;两者在英语和汉语小句中连用的情况也很普遍,没有必要进行主观和客观取向的区分。
In system functional grammar, the modality expresses the speaker’s judgment of the possibility and necessity of the utterance. Reproducing the judgment of the speaker regularly into the time uncertainty belongs to the category of time, which should not be regarded as modality in functional grammar. Recurrence can be used as a level-difference resource to evaluate the speaker’s evaluation significance from the perspective of time and frequency. In the system functional grammar, the modal auxiliary verbs and adverbs express the subjective views and attitudes of the speakers, all of which have subjective characteristics in semantics; the syntactic structure of sentences belonging to the same sentence in the syntactic sense; and the two of them being used in English and Chinese clauses It is also commonplace that there is no need to distinguish between subjective and objective orientations.