语境不仅是常规的语言材料、修辞手段选择运用的重要标准 ,而且也是辨别语言的超常偏离正　　负优劣的主要依据。适合语境的 ,是正偏离 ,反之 ,便是负偏离。正偏离是一种艺术化的偏离 ,具有常规表达　　形式所不可能达到的修辞效果 ,它主要包括语音偏离 ,语义偏离 ,语法偏离 ,逻辑偏离等 Context is not only an important criterion for the selection and application of conventional linguistic materials and rhetorical devices, but also the main basis for distinguishing the abnormality from the positive or negative of language. Context suitable, is positive deviation, on the contrary, it is negative deviation. Positive deviation is a kind of artistic deviation, with the rhetorical effect that can not be achieved by the conventional expression. It mainly includes phonological deviation, semantic deviation, grammatical deviation, logical deviation, etc.