本文基于语调格局理论,探讨了英语四种基本语气语调(陈述语气、疑问语气、祈使语气和感叹语气)中作为语调平衡杠杆的中线在区分四种语气语调中的功能差异。结果显示,在语调格局中,中线对不同语气语调起到了重要的“标识性”作用。不同语气的中线空间分布,以及中线区间分布,在语调研究中具有重要作用。 This paper, based on the theory of intonation pattern, explores the functional differences in the four tone intonation between the four basic tone states of speech (the tone of the tone, the tone of the question, the tone of the pray and the tone of the lament) as the lever of the balance of tone in English. The results show that in the intonation pattern, the middle line plays an important role of “marking ” in tone of different tones. The mid-line spatial distribution of different tones and the distribution of mid-line intervals play an important role in intonation research.