Epistemic modal verbs and adverbs of necessity are claimed to be positive polarity items. We study their behavior by examining modal spread, a phenomenon that appears redundant or even anomalous, ...

Modal verbs support other verbs in a sentence to indicate possibility or necessity. Learn about modal verbs with BBC KS3 Bitesize.

The modal system in English is unique among verbs (lack of an -s ending, occurrence without to before an infinitive, tense forms without corresponding time reference), with individual modals-partly ...