How can 'must' be used to indicate a logical consequence?

An auxiliary verb is used to affect the tense, voice, or mood of a main verb. In grammar, a modal auxiliary verb is used specifically to express possibility, ... The most common obligation modal verbs are “must” and “should.” Possibility Modal Verbs: These verbs are used to express the speaker's opinion about the ... Modal phrases (or semi-modals) are used to express the same things as modals, but are a combination of auxiliary verbs and the preposition to. The modals and ... used to do something to talk about something that happened regularly or was the case in the past, but is not now. Modal verbs express actions based on necessity, obligation, possibility, ability, or intent. That is why they are usually combined with other verbs. We use modals to show if we believe something is certain, possible or impossible: My keys must be in the car. It might rain tomorrow. That can't be Peter's coat ... 3 days ago ... We often use modal verbs or other modal expressions when we want to express an opinion or attitude about a possible fact or to control a possible action. ... used modal verbs in the English translations of Shih chi. 2.2. Modality values. The modality of a sentence represents the speaker's or writer's cognitive ... Modal verbs almost always accompany the base (infinitive) form of another verb using this simple formula: modal + (not) + verb. For example: She could sing very ... Apr 4, 2021 ... Modals are a special group of helping verbs, e.g. "can" and "could." The distinction between dynamic, epistemic, and deontic uses of modal ...