本文从认知语义学的动力图式角度对情态表达进行研究，继承了动力图式（ Force-Dynamic ）中对于“趋势”动词命题分析的优势，同时弥补了以往FD研究对含有比较多系动词的命题解释力不强的缺陷。将情态表达的“非现实语义力”等级数量的概念带入FD模式中，重点探讨了情态中心词表达语义力的等级数量划分。使得动力图式更加清晰，释解更为有力。同时指出情态表达的动力图式展现，在英语教学中发挥的认知心理学作用。%This thesis researches the modal expressions from the perspective of FD in cognitive semantics , inherited the proposition analysis advantages of word "Trends"in Force-Dynamic, while to make up the defects for a previous FD research proposition con-tained more link verbs explanatory power is not strong .Take the the concept of modal expression "unreality semantic force"scalar im-plicature into the FD mode , probes into the scalar implicature division of modal center words to express the semantic force which will make the FD more clear , more powerful to unwind .Meanwhile , point out that the modal expression of FD show , and in English lan-guage teaching to play the role of cognitive psychology .
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