Modals and Periphrastics in English

English has a number of periphrastic verbal forms that are semantically close to particular modal verbs and perform suppletive functions in relation to them (eg, have (got) to - must and be able to - can). After an exploration of the syntactic, semantic and phonological properties of potential periphrastic forms, this study investigates the nature of the relationship between the modals must, shou...