Grammatical Metaphor and Pragmatic Presupposition

Through the investigation of the relation between grammatical metaphor and pragmatic presupposition under the framework of Halliday's systemic-functional grammar, this paper attempts to illustrate that grammatical metaphor is also an effective way to realize pragmatic presupposition.This study shows that ideational metaphor, interpersonal metaphor and textual metaphor all bear a theoretical foundation to trigger pragmatic presupposition on both the lexicogrammatical and semantic level.