Only nouns can be singular, pertaining to one person or thing, or plural, pertaining to more than one. "Group words" (e.g. herd, crowd) are treated as singular but can also be pluralized (e.g. herds, crowds) if there are more than one group.
Two kinds of nouns are common or proper, singular or plural.
The noun 'car' is a singular, common, concrete noun; a word for a motor vehicle; a word for a thing.
words that don't normally have an 's' on the end
The pronoun 'you' is the second person, singular or plural, subjective or objective, personal pronoun.
The noun 'ants' is the plural form of the singular noun 'ant', a common, concrete noun; a word for a thing.
The noun eyes is a plural, common, concrete noun, the plural form for the singular eye, a word for a thing.
This is the best answer I could find.There are a number of noun groups in English that sound plural in the singular form.Nouns are a shortened form of 'a pair of...' (pair is singular). Those include such things as pants, shorts, scissors, shears, eyeglasses, binoculars, etc. The plural forms are pairs of pants, pairs of binoculars, pairs of tweezers, etc.Nouns that end in -is in the singular and -es in the plural; for example axis to axes, basis to bases, crisis to crises, oasis to oases, etc.Nouns that end in -us in the singular and -i in the plural; for example alumnus to alumni, cactus to cacti, octopus to octopi, radius to radii, etc. (note that cactuses, octopuses, and radiuses are now also being accepted as the plural forms)Nouns called aggregate nouns; words that are used for the singular and the plural; for example, accommodations, archives, communications, congratulations, stairs, news, etc.
The noun 'leaves' is a plural, common, concrete noun (the plural form of the singular noun 'leaf'), a word for a thing.The word 'leaves' is also the third person, singular, present of the verb 'to leave'.
When a word ends with "s" in its singular form, it usually indicates possession or a descriptive quality, while when a word ends with "s" in its plural form, it typically indicates that there is more than one of something being referred to.
The plural form of tomato is tomatoes.
The noun 'children' is a plural, common, concrete noun; the plural form of the singular noun 'child', a word for a person (people).
The noun 'feet' is a plural (irregular plural), common, concrete noun; a word for a body part, a thing. The singular form is foot.