Based on the theory of Rhetorical Structure,this paper studies the use of rhetorical relations in essays with the help of RST,taking 300 practical writing texts of high school students'English letters as corpus.The re-sults show that there is no significant difference in the number of rhetorical relations used by high school students.In addition,there are significant differences in the frequency of rhetorical relations between the high and low level groups.There was little difference in the types of rhetorical relations used by the high and low level groups in each grade.The dominant rhetoric relationship of the high and low level groups in each grade has some overlap,but its frequency,proportion and order are vary.The dominant rhetorical relations used by all grades are the relation of e-laboration,connection and association.Based on the research findings,this study puts forward several suggestions for the teaching of English practical writing in senior high school.
english practical writingrhetoric relationshigh school studentsletters
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