PropositionalTextualInterpersonalOEinterrogativepronouninterrogative complementizerhwæt þa(contextual implication)hwæt(shared
knowledge)(la/eala) hwætinterrogativeadverbinterrogativeadjectiveMEwhat(speaker surprise)what ho(attention getting)what a(exclamation)EModE PDEy'know what?Figure 2.1 Development ofwhatSource: adapted from Laurel J. Brinton,Pragmatic markers in English: Grammaticalization and discourse functions.Berlin and New York: Mouton de Gruyter, 1996, p. 207; with permission.72