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errors in students’Englishcompositions and put forward corresponding strategies(Zhang Wei,2010;Zhang Jiafu,2013).These studies have greatly enriched the theory of discourse cohesion to a certainextent.

Chapter 3 Theoretical Framework ............................. 13

1. Simple Word Repetition ................................. 13

2. Complex Word Repetition ............................. 13

3. Synonym ................................... 13

Chapter 4 Methodology ................................ 18

4.1 Research Questions ............................... 18

4.2 Research Participants ............................ 18

4.3 Research Tools ............................. 18 

Chapter 5 Results and Discussion ........................ 22

5.1 The Use of Lexical Cohesive Devices in Different Genres ............. 22

5.1.1 The Use of Lexical Cohesive Devices in Argumentative essays............................ 22

5.1.2 The Use of Lexical Cohesive Devices in Narrative Essays ....... 23

Chapter 5 Results and Discussion

5.1 The Use of Lexical Cohesive Devices in Different Genres

There are some differences in the use of various lexical cohesive devices in differentgenres of compositions by high and low level students.The specific situations in differentgenres are as follows:

5.1.1 The Use of Lexical Cohesive Devices in argumentative essays

According to the data,we can see that 60 students used 1062 lexical cohesion in theprocess of argumentative writing,there was a significant difference in the number of lexicalcohesive devices used by the high and low level groups,with 624 in the high level group and438 in the low level group,with the highest number of lexical cohesive devices used beingcollocations at 40.6%.However,there are some differences between high and low levelgroups.The frequency of the high level group is 41.3%,which is also the most frequentcohesive devices used by high level group in argumentative essays,while the frequency oflow level group is 39.5%.

Chapter 6 Conclusion

6.1 Research Findings

This study conducted an educational survey for nearly five months to explore the use oflexical cohesive devices in students’English writing and its correlation with compositionquality.It is guided by the discourse cohesion theory and combined with the teachingpractice of English writing in this context.The relevant data was collected and tested byusing one questionnaire,two essay tests,one interview,text analysis,and other researchtechniques,and the following conclusions were drawn.

In the argumentative,the most frequently used cohesive devices in high level groupingare collocations,followed by simple word repetition,and the following four cohesive devicesare used from high to low:complex word repetition,synonyms,antonyms,and hyponym.Inargumentative writing,simple word repetition is the most frequently used in low level group,followed by lexical collocation,complex word repetition,synonym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。