歧义是英语中的常见现象,它会造成理解障碍,甚至影响正常的语言交流。但是双关语却是对歧义的巧妙利用。它的灵活运用不仅使英语变得活泼幽默,而且对丰富英语的歧义现象有着积极的意义。本文分析了语音歧义、词汇歧义、结构歧义和语用歧义现象,探讨了英语歧义在口语交际、文学作品及广告中的双关效应。 Ambiguity is a common phenomenon in English, it will cause obstacles to understanding, and even affect the normal language exchange. However, pun is clever use of ambiguity. Its flexible use not only makes English become lively and humorous, but also has a positive meaning to enrich the ambiguity of English. This paper analyzes the phenomena of phonetic ambiguity, lexical ambiguity, structural ambiguity and pragmatic ambiguity, and explores the punitive effect of English ambiguity in oral communication, literary works and advertising.