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emantic relation. According to Hallidayand Hasan, cohesive devices are derived from different kinds of complete relationcoherent text. And the structure of a text is among grammatical items which are judgedas cohesive ties. In Cohesion in English, Halliday and Hasan divided cohesion into twodifferent categories which are shown as follows:grammatical cohesion and lexicalcohesion. Among the two categories, there are five various groups of cohesive devices,namely, Reference, conjunction, substitution, ellipsis and lexical cohesion.
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Chapter3 methodology........26
3.1 Research Questions.....26
3.2 Corpora Involved........26
3.3 Subjects.............28
3.4 Tools and Instruments Used............28
3.5 Research Procedures.............31
3.5.1 Data Tagging.............31
3.5.2 Word List Generating..........33
3.5.3 Data Processing and Analyzing....34
Chapter 4 Results and Discussion..........34
4.1 General Distribution of Six Subtypes of Lexical Cohesion inSamples....35
4.2 The Relationship between Cohesion and Lexical Cohesion.............37
4.3 Error Distribution in Samples.........42
4.4 Lexical Cohesive Ties and Writing Quality........45
4.5 Summary...........56
Chapter5 Conclusion...........57
5.1 Findings of the Present Study.........57
5.2 Pedagogical Implications......58
5.3 Limitation of the Study.........62
5.4 Suggestions for Future Study......... 63

Chapter 4 Results and Discussion

Aimed at studying lexical cohesive devices in English major students’compositions,the research mainly discusses the lexical cohesion from three aspects:the relationshipbetween lexical cohesion, the relationship between lexical cohesion and other cohesionused in English composition, and the relationship between lexical cohesion and errorsmade by English major students. After giving a detail introduction of the relevanttheories and theories concerning lexical cohesion, and a detailed interpretation ofmethodology of the study, this chapter will discuss the features of lexical cohesivedevices in English major students’ writings and analyze the data about the mentionedquestions in the above part.

4. 1 General Distribution and Discussion of Six Subtypes of Lexical Cohesion in Samples

As mentioned in chapter three, the study analyzes the word frequency of the targetcorpus by set another larger corpus as the comparing target, and the results are showingas follows:From the above table, we can clearly see that the top 15 words that belongs to open-setwords are mainly related to the words appearing in the topic, such as letter, writing,phones and telephone, ect.In chapter three, it also be mentioned that the study regards the writing genre,topic of the composition and the length as the controlled variables, 20 high-scorecompositions and 20 low-score writings are sampled. After careful and detailed markingand calculation of the 40 samples by the author and another linguistic postgraduateunder the guidance and help of my tutor,and the the total numbers and the frequencyeach subcategory of lexical cohesive ties applied in the compositions is figured out anddisplayed in the following table:Whereas seen vertically, the most frequent lexical cohesive ties used in TEMwritings is simple repetition, followed in order complex repetition, collocation,synonym, hyponym本论文由英语论文网提供整理，提供论文代写，英语论文代写，代写论文，代写英语论文，代写留学生论文，代写英文论文，留学生论文代写相关核心关键词搜索。