modal adverb

Sources

• LYONS 1977 807

  LYONS, John. (1977) Semantics. Vols. 1 & 2. Cambridge : Cambridge University Press.

• HALLIDAY & HASAN 1976 135

  HALLIDAY, M.A.K. & HASAN, Ruqaiya. (1976) Cohesion in English. London: Longman. 

• WEINREICH 1980 48

  WEINREICH, Uriel. (1980) On Semantics. Philadelphia: University of Pennsylvania Press.

• ELL 2519 (modal (sentence) adverbial)

  The Encyclopedia of Language & Linguistics. (1994) Oxford: Pergamon Press.