作为一种独特的语言艺术,诗歌语言高度凝练而跳跃的特点决定了它不可能严格遵守语法规则。然而语言系统也是创作和解读诗歌的重要方面,系统功能语法为分析诗歌这种较为自由的语言形式提供了理论依据,本文将用语气和情态分析蓝斯顿·休斯的诗歌《杂种》,从人际功能入手解读这首诗歌所传达的思想情感,从而说明系统功能语法在诗歌这种文学形式中的作用。 As a unique linguistic art, the poetic language is characterized by its high concentration and jumping, which makes it impossible to strictly abide by grammatical rules. However, the linguistic system is also an important aspect of the creation and interpretation of poetry. The systematic functional grammar provides a theoretical basis for the analysis of the more liberal linguistic forms of poetry. This article analyzes the “hybrid” of the poetry of Reston by Hughes Interpersonal functions begin to interpret the thoughts and emotions conveyed by this poem, thus illustrating the function of systematic functional grammar in the literary form of poetry.