Two forms for the plural of the noun genus are accepted: genera and genuses
The noun 'species' is an uncountable noun which is used with a singular or a plural verb form. The noun 'species' is a type of uncountable aggregate noun, a word representing an indefinite number of elements. Examples:This species of ivy is prolific in some parts of the country.Many species are endangered due to shrinking habitat.Note: The noun 'specie' is also an uncountable noun as a word for money in the form of coins.
The noun children is the plural form of the singular noun child.
The noun family is the singular form; the plural form is families.
The noun 'fun' is a singular non-count noun, it has no plural form.
The singular form for the noun people is person.
The noun coach is the singular form. The plural form is coaches.
The form thief is the singular noun; the plural form is thieves.
The noun vest is the singular form.The noun vest's is the singular possessive form.
No, clowns is a plural noun. The singular form is clown.
The noun 'dish' is the singular noun. The plural form is 'dishes'.
No, the noun 'farm' is the singular form; the plural form is farms.
The noun quilt is the singular form. The plural noun is quilts.