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Abstract：With the development of society and the technical advancement, there are a great many neologisms emerging in the English vocabulary. They are not created freely; they follow some rules, the processes of word –formation.
Without the introduction and conclusion, this article includes three sections, which form the main body of this essay. They d本论文由英语论文网www.51lunwen.org整理提供efine the sources of English neologisms, word-formation processes, and the general trend of English neologisms respectively. 
The purposes of this article are to study the practical value of English neologisms, stimulate English learners’ interest, and help them enlarge their vocabulary effectively. Besides, it will help them overcome the obstacle in their English learning and reading caused by the neologisms.

Key Words：Neologisms, sources, word-formation processes, trend

摘　要：随着现代社会的飞速发展和科学技术的日新月异，现代英语词汇中涌现出了大量的新词。这些新词并非随意构成，而是遵循了一定的构词规则，即英语词汇构词法。
除去引言和结论，文章共分三个部分。它们构成了文章的主体，主体部分分别就英语新词的来源，构词方法，和英语词汇的发展趋势作了详本论文由英语论文网www.51lunwen.org整理提供细的研究和论述。
文章旨在探索新词的实用价值，激发英语学习者学习英语的兴趣，帮助他们有效地扩大词汇。克服在英语学习和英语阅读中的因新词的出现导致的学习障碍。
 
Introduction：As a famous American translation theorist Eugene A. Nada (1982) said, “One of the most important characters in English is which could be easily changed.” Exactly, with the development of society and technology advancement, English neologisms are created one after another. According to the counting of the Barnhart Dictionary Companion Magazine, 1500-1600 new words are entering their computer database each year. Modern English has a vocabulary of 500,000 words, and 2/3 of them are created during the latest 300 years（Wang Rongpei,1997）When we read the English newspapers (such as Netizen) and magazines (such asYetties) or listen to the English broadcast (Watergate), how frequently we encounter neologisms and we have to acknowledge the fact that we can not always depend on the dictionaries, so it is very important for English learners to study neologisms.
According to the Oxford 本论文由英语论文网www.51lunwen.org整理提供Dictionary of New Words (Elizabeth Knowles with Julia Elliott, 1998), neologisms refer to the new words and expressions used in the given period. In the English linguistic system, the changing of phonetics and grammar is relatively slow; both of them possess the stability to a certain degree. But the vocabulary is the most sensitive and loose part in the system, the two features offer the great possibility for creating new words. However, English neologisms are not produced freely; most of them are subject to some rules as well as the word-formation processes.
In order to have a better understanding of English neologisms, in this article three aspects will be chosen to discuss and analyze the new words. They are: the sources of English neologisms; word-formation processes; and the general trend of English neologisms.

Ⅰ. The Sources of English Neologisms

In the linguistic system, vocabularies have a close relationship with the ages. So they can reflect the human history and all kinds of social changes very well. Meanwhile, the emergence of neologisms is inevitably effected by the social conditions, customs and habits, values, thinking ways and so many other social factors. To have a good knowledge of the semantic gro本论文由英语论文网www.51lunwen.org整理提供unds, it is necessary for us to explore the social backgrounds which influence the creation of English neologisms.

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