Grammatical number

From Teflpedia

Grammatical number is a grammatical property of nouns that express how many nouns there are.

In English, nouns either lack number and are mass nouns, or they possess number. If they possess number they are count nouns and are either singular or plural.

Number Countable Uncountable
Singular Countable singular Mass noun
(uncountable singular)
Plural Countable plural Uncountable plural

English nouns generally carry grammatical markers indicating number. Verbs sometimes have number concord, though often in English the singular and plural forms of a verb are the same.

Dual number is a special type of plural, with grammatical number=2