must modal

Modal Verbs Must Be Raising Verbs
We have to trust them, but they must also know... : A corpus-based investigation of the core modal must and the emerging modals have...
An empirical investigation of the allegedly non-normative modal predicate with must, not, and the perfect infinitive of the main verb
Modal Must in Philippine Editorials: A Corpus-based Study
A Pragmatic Study of the Modal Verb 'must' in Modal Systems
On the Modal Verbs MUST and MAY in the English Language and Their Equivalents MORATI and MOĆI in the Serbian Language
Meaning and function of the modal MUST
Determination/un-determination of eventualities and epistemic modality: an analysis of english modal MUST and WILL
The Semantic Uses of the Modal Must and the Related Frequency of Subjects and Verb Phrases
On the contribution of aspectual forms to the construction and interpretation of utterances containing the modal MUST