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Use for questions regarding semi-modals, for example: 'need', 'dare', 'ought to', and 'used to'.

A verb that functions to some extent like a modal verb or modal auxiliary verb. Typically forming negative and interrogative constructions, and are followed by a bare infinitive, English semi-modals include 'need', 'dare', 'ought to', and 'used to'. See the Oxford Dictionaries definition, and other examples.