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2 강승만, "Why Is It DifficultTo Teach English Subjunctive?" 한국중앙영어영문학회 49 (49): 21-35, 2007
3 Azar, B., "Understanding and Using English Grammar" Xi’an Jiaotong University Press 2008
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5 Harsh, W., "The Subjunctive in English" University of Alabama Press 1968
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9 James, F., "Semantics of the English Subjunctive" University of British Columbia Press 1986
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1 Wu, X., "“If Triangles were Circles...”— A Study of Counter Factual in Chinese and English" Crane Publishers 1994
2 강승만, "Why Is It DifficultTo Teach English Subjunctive?" 한국중앙영어영문학회 49 (49): 21-35, 2007
3 Azar, B., "Understanding and Using English Grammar" Xi’an Jiaotong University Press 2008
4 He, G, "The forms and groupings of subjunctive mood" 3 : 60-65, 1999
5 Harsh, W., "The Subjunctive in English" University of Alabama Press 1968
6 Overgaard, G., "The Mandative Subjunctive in American and British English in the 20th Century" Uppsala 1995
7 Renaat, D., "The Grammar of the English Tense System" Mouton de Gruyter 2006
8 Palmer, F. R., "The English Verb" Longman 1987
9 James, F., "Semantics of the English Subjunctive" University of British Columbia Press 1986
10 Zhou, S, "Reflections on the learning of subjunctive mood in English language" 4 : 44-46, 2004
11 He, G, "Reconsider the forms of subjunctive mood" 6 : 45-49, 1994
12 Palmer, F. R., "Mood and Modality" World Book Publishing Company 2007
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16 Aijmer, K., "Computer Learner Corpora, Second Language Acquisition and Foreign Language Teaching" John Benjamins 55-76, 2002
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18 Yi, Z, "Argument over the existence of subjunctive mood in English language" 1 : 9-15, 1988
19 Halliday, M., "An Introduction to Functional Grammar" Foreign Language Teaching and Research Press 2000
20 Quirk, R., "A Comprehensive Grammar of the English Language" Longman Group Limited 1985
21 Eckersley, C. E., "A Comprehensive English Grammar" Longman 1961