Modal verb: Auxiliary verbs expressing necessity or possibility.

Mood expression: Indicators of attitude towards action's reality.

Linguistic modality: Conveying likelihood, ability, permission, obligation.

Grammatical mood category: Classification based on speaker’s perspective and intention.

Expressive function in language: Reflects speakers’ attitudes toward propositions.

Relating to a particular way or method.

Expressing mood in grammar and linguistics.

Concerning the manner of doing something.

Indicative of possibility, necessity, or permission.

Associated with styles or modes of behavior.