Сategory of number of nouns

The problem of category of number of nouns is very essential nowadays.A number of nouns are used only in the form of the plural.To consider the category of number of nouns.To study different cases of usage of category of number of nouns.To study Russian category of number of nouns, different cases of usage.The Category of Number of Nouns.Nouns Used in Both Numbers Singular and Plural.To the group of nouns which have both numbers belong.Forms of case - it simultaneously forms of gender and nouns.The categories of number form one opposition - singular and plural.