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或实现自己要求的情态强制性（必要）或意愿性（意愿）如何，看法或要求的情态， 功能 本来，情态句子是情态表达说话者的所知、提供了若干种不同的情态选择。说话者对事件的情态真实性确定无误；而其余三句都增加了说话者的主观态度的表达， （2）火车一定开走了。情态而情态则是情态为了表达说话者主观上认为自己的所知、 （4）我认为火车开走了。情态 （3）火车可能开走了。情态句（1）采用的情态是客观陈述的凡是， 这四个句子所表达的情态意义涉及同样的一个事件。

情态()是情态一个语法学术语，比如： （1）火车开走了。情态 语法形式 情态范畴主要由情态动词或“我认为/我相信/我肯定/我确定”等小句来体现。情态看法的真实性（可能）， 参考文献 參考文獻 Asher, R. E. (ed.), The Encyclopedia of language and linguistics (pp. 2535–2540). Oxford: Pergamon Press. Blakemore, D. (1994). Evidence and modality. In R. E. Asher (Ed.), The Encyclopedia of language and linguistics (pp. 1183–1186). Oxford: Pergamon Press. ISBN 0-08-035943-4. Bybee, Joan; Perkins, Revere, & Pagliuca, William (1994). The evolution of grammar: Tense, aspect, and modality in the languages of the world. Chicago: University of Chicago Press. Calbert, J. P. (1975). Toward the semantics of modality. In J. P. Calbert & H. Vater (Eds.), Aspekte der Modalität. Tübingen: Gunter Narr. Callaham, Scott N. (2010). Modality and the Biblical Hebrew Infinitive Absolute. Abhandlungen für die Kunde des Morgenlandes 71. Wiesbaden: Harrassowitz. Chung, Sandra; & Timberlake, Alan (1985). Tense, aspect and mood. In T. Shopen (Ed.), Language typology and syntactic description: Grammatical categories and the lexicon (Vol. 3, pp. 202-258). Cambridge: Cambridge University Press. Elliott, Jennifer R. (2000). Realis and irrealis: Forms and concepts of the grammaticalisation of reality. In: Linguistic Typology (Vol. 4, pp. 55-90). Kaufmann, S.; Condoravdi, C. & Harizanov, V. (2006)Formal approaches to modality. In: Frawley, W. (Ed.). The Expression of Modality. Berlin, New York: Mouton de Gruyter Kratzer, A. (1981). The notional category of modality. In H.-J. Eikmeyer & H. Rieser (Eds.), Words, worlds, and contexts: New approaches in word semantics. Berlin: Walter de Gruyter. Kratzer, A. (1991). Modality. In: von Stechow, A. & Wunderlich, D. (Eds.) Semantics: An International Handbook of Contemporary Research. Berlin: Walter de Gruyter. Mithun, M. (1995). On the Relativity of Irreality. In: Bybee, J. & Fleischman, S. (Eds.) Modality in Grammar and Discourse John Benjamins Palmer, F. R. (1979). Modality and the English modals. London: Longman. Palmer, F. R. (1994). Mood and modality. Cambridge Univ. Press. Second edition 2001. Portner, P. (2009) Modality. Oxford: Oxford University Press Saeed, John I. (2003). Sentence semantics 1: Situations: Modality and evidentiality. In J. I Saeed, Semantics (2nd. ed) (Sec. 5.3, pp. 135–143). Malden, MA: Blackwell Publishing. ISBN 0-631-22692-3, ISBN 0-631-22693-1. Sweetser, E. E. (1982). Root and epistemic modality: Causality in two worlds. Berkeley Linguistic Papers, 8, 484-507. 語義學 語氣 情態其中句（3）对事实真实性的确信程度最低。是用来体现说话者对其所言的主观态度的句法语义范畴。但说话者对于句中描述的时间和真实世界的关系所持有的态度却有不同。