Chapter One Introduction
With the rapid development of the economic, science and many other aspects, China has more and more communications and cooperation with other nations. English, as the most important and widely used language, plays a significant role in promoting the international exchange and cooperation. Vocabulary, as one of the three importanting redients of a language (the other two are sound and grammar), is the foundation stone of the language. Without grammar, little can be expressed; without vocabulary, nothing can beexpressed. In a dictionary, an overwhelming majority of words are polysemous. And polysemy is the main part and the most difficult part in vocabulary teaching and learning. According to the experiment, it finds out that the teaching method of polysemy has great impact on students’ vocabulary learning.
随着经济，科学以及其它许多方面的快速发展，英语毕业论文，中国有越来越多的与其他国家的交流与合作。英语，作为最重要和最广泛使用的语言，在促进国际交流与合作中发挥了显著影响。词汇，作为三个进口安亭的一种语言。成份（其他两个是声音和语法）之一，是语言的基石。没有语法，小可以表达;没有词汇，没有什么可以表达。在字典中的话，绝大多数是多义的。多义词汇教学和学习中的主体部分和最困难的部分。根据实验，发现多义的教学措施有很大的作用，对学生的词汇学习。
1.1 Research background
在英语教学中，词汇教学始终是一个困难的部分。多义词教学，英语论文题目，词汇教学困难的部分。所以，不应该被忽视的重要性，多义词在英语教学和学习。
In English teaching, vocabulary teaching is always a difficult part. And the polysemous words teaching are the difficult part of the vocabulary teaching. So the importance of polysemous words should not be ignored in English teaching and learning.The current vocabulary teaching and learning methods at college are usually: first, tellthe students the spelling of the words, tell them how to pronounce the words, next explainthe meaning of the words, at last, tell the structure of the words and make a sentence of thewords. As for polysemous words, the teachers usually tell the students the meaning of thewords in the context or list all the meanings of the words without explaining theconnection between these meanings. These are all traditional English vocabulary teachingmethod. When looking up in an English dictionary, it is easy to find out that most of thewords have more than one meaning. According to the English syllabus for college students,they need to handle almost 4200 words if they want to pass CET4; and 5500 words if theywant to pass CET6. These words not only demand the students to know just one meaningof each words, but also demand the students to learn of the other meanings and to knowhow to use these meanings in different context. So it is a formidable task for collegestudents to complete. The polysemy teaching is always a weak point in China, traditionalpedagogy dominates most of the polysemy teaching. But the traditional vocabularyteaching method is hard for students to master so many polysemous words. So it is crucial to find a new way and a more effective way to teach polysemous words.
1.2 Research significance and purpose
The most common and significant phenomenon in semantics is polysemy. “Polysemyrefers to the phenomenon in which a word that has multiple meanings related conceptuallyor historically; words in a language that carry more than one meaning are calledpolysemy”(Fromkin,1998:123). It is the phenomenon whereby a lexical item is commonlyassociated with two or more meanings that appear to be related in some way (Evans andGreen, 2017). According to Schmitt &McCarthy (Schmitt &McCarthy, 2017:10), the sizeof high frequency words is 2,000 to 3,000. It is surprising to find
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