फ़्लैशकार्ड

Grammatical number is the linguistic category that distinguishes between one entity (singular) and more than one entity (plural). Countable nouns reflect this distinction through endings such as -s or -es, or through irregular vowel changes. Uncountable nouns describe materials, concepts, or collective items as a whole mass and generally remain singular in English.

The supervisor reviews every safety checklist before noon.