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nds that 45.6% of thecompositions are with a topic statement at the very beginning of the whole text and moststudents fail to take advantage of topic sentence when arranging their paragraphs.
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Chapter Three Theoretical Framework of Modality........ 10
3.1 Definitions of Modality........  10
3.2 Types of Modality........  12
3.2.1 Epistemic Modality........  13
3.2.2 Evidentical Modality........  14
3.2.3 Deontic Modality........  15
3.2.4 Dynamic Modality........  15
3.2.5 Alethic Modality........  16
Chapter Four Contrastive Analysis of Modal Verbs in WECCL........  18
4.1 Research Subject........  18
4.2 Research Questions........  18
4.3 Research Methodology........  19
4.4 Analysis of the Data........  21
4.5 Discussion ........ 41
Chapter Five Conclusion........  44
5.1 Major Findings ........ 44
5.2 Limitations........       45
5.3 Suggestions for Further Research........  46

Chapter Four Contrastive Analysis of Modal Verbs in WECCL and NS Texts

4.1 Research Subject
This thesis pays more attention to the use of modal verbs in the English argumentativeessays written by Chinese English learners and English native speakers. In the literaturereview, the thesis has mentioned the vitality of modal verbs in the section of expressingdistinctive futures of modal verbs. Modal verbs are the core of all the expressions to expressmodality approach, and modality is subject to modal verbs. So modal verbs are the researchsubject. The researched modal verbs includes can, will, should, must, could, might, shall,would, may and so on. These modal verbs were extracted from WECCL and NS corpora,which are employed to compare the modality of modal verbs. The topic of this thesis is the study on modality of modal verbs in English argumentativeessays written by Chinese English learners. This present study attempts to answer thefollowing questions through comparison with frequencies, frequency, Chi-square andlog-likelihood by the usage of modal verbs：Firstly, based on the two different corpora of Chinese English learners and nativespeakers, the author aims to find out whether there are differences in using modal verbs, andtestify which modal verbs Chinese English learners overused or underused.

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Conclusion

Generally speaking, this research contrasts the differences of Chinese English learnersand English native speakers in the use of modal words with the corpora instrument ofAntConc. In this paper, from the schematic point of view the author has contributed ananalysis for the study. It explores the overuse and misuse of modal verbs by Chinese Englishlearners and analyzes the reasons for causing these phenomenons.This research mainly makes a contrastive analysis of using modal verbs extracted fromLiang Maocheng^s two corpora—WECCL and NS based on Palmer's classification ofmodality, which is to conclude the differences to out the reasons why learners use Englishmodality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。