【正文】 rside yesterday. Sentence ( 5a) is ambiguous since the word “bank” in Sentence ( 5a) has two unrelated meanings: “a financial institution” in (5b) and “a riverside” in ( 5c). 3 . Historical Change With the development of our nature and society, scientific technology specially, great changes have happened in the meaning of the words. In the past decades, new terms like “AIDS”, “Coke”, “guided missile” have e into being。 關鍵詞： 歧義；原因；消歧；方法 1. Introduction ( 標題中實詞全部大寫 ) 【正文用小四號字體， 倍行距，首行縮進 2 字符】 Ambiguity is a subtle but pervasive phenomenon in English. But as to what is ambiguity there are many versions. Chomsky hold that ambiguity occurs when an expression_r_r_r has grammatical structure and is semantically relational but its deep structure can be interpreted in two or more ways (1965:25). 【句號在夾住之后 , 注釋要與參考文獻相吻合，且要精確到頁碼】 Yang Ping proposed that ambiguity is with various understandings or multimeaning (2020:38). Cann stated “A sentence is said to be ambiguous whenever it can be associated with two or more different meanings.” (1993:8) All in all, ambiguity refers to the phenomenon that an equivocal sentence or expression_r_r_r can be understood in more than one way. On the basis of different definitions, the paper focuses on four perspectives: phonological, lexical, syntactic and pragmatic ambiguity. Since ambiguity is a fundamental problem of language prehension and an obstacle of munication, efforts are made into and attention is paid to the resolution of ambiguity so as to achieve successful and effective munication. 【每一大部分之間要求空一行，下同】 2. Theoretical Background Researches on English ambiguity can be traced far back to Greece, when Aristotle, a wellknown philosopher and thinker discussed ambiguity in his De Sophistics Elenchis. He pointed out the sophistry caused by language had six sources, among which is ambiguity (1958:257). Since then many western scholars showed interest in the topic. Empson published Seven Types of Ambiguity in 1930, and discussed ambiguity in a literary view and pointed out that interpreting ambiguity was the basic task of semantics (1930:78). The generative grammar about deep structure and surface structure by Chomsky gave a forceful explanation to ambiguous structure. Ambiguity in Natural Language by Kooij is a great contribution to the study of ambiguity as well as the psycholinguistics. Halliday’s functional grammar focused on the function of language by insisting that language structure should be explained in the process of its use (1985:19). And Su’ s Lexical Ambiguity in Poetry mentioned that the study of ambiguity must be placed in the context of language use. From the above, we find, though ambiguity has been discussed in various linguistic fields, its study just focused on one kind of ambiguity. This paper will analyze ambiguity in five parts: Part One will introduce various definitions of ambiguity。 approaches 論英語中的歧義現(xiàn)象 【 三號 】 廖苑 【 小四號 】 指導老師： XXX 【 小四號 】 （井岡山