Mood identifies the speaker's perspective on the proposition expressed by a clause. Sometimes, mood is inflected on the verb (referred to as mode or modality). In English, mood is typically expressed using modal auxiliaries as well (Eg. should, may, could). Typical moods include obligation, necessity, possibility, and ability. Mood is also sometimes used to refer to sentence type such as questions, commands etc.
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- Crystal, David. (1997) A Dictionary of Linguistics and Phonetics. Oxford, UK: Blackwell.