The plural of nouns is usually formed by adding s to a singular noun.
Example: lamp, lamps; cat, cats; fork, forks; flower, flowers; pen, pens
Rule 2 :
Nouns ending in s, z, x, sh, and ch form the plural by adding es.
Example: moss, mosses buzz, buzzes box, boxes
dish, dishes church, churches
Special Note:
If you add s to such nouns as fox, bush, and bench, you will find that you cannot
pronounce them without making an additional syllable. This is why such nouns
form the plural by adding es.
Quick Review
Rule 3:
Nouns ending in y preceded by a consonant is formed into a plural by changing
y to ies. Examples: lady, ladies; city, cities; army, armies
Rule 4:
Nouns ending in y preceded by a vowel form their plurals by adding s.
Example: boy, boys; day, days
Rule 5:
Most nouns ending in o preceded by a consonant is formed into a plural by adding es. Example: hero; heroes; grotto, grottoes, motto, calico, buffalo ,hero, potato, cargo, volcano, grotto, mosquito* tomato
* tornado* buffalo* portico* veto
*may add s or es
The following are among those that add s only. Example, canto, solo, piano, lasso, halo , memento, albino, sirocco.
Special Note:
Most nouns ending in o preceded by a vowel is formed into a plural by adding s.
Example: folio, folios; cameo; cameos; studio, studios; portfolio, portfolios.
Rule 6 :
Some nouns ending in f or fe are made plural by changing f or fe to ves.
Example: beef, beeves; wife, wives
Exceptions: The following may form their plurals by adding s.
chief, chiefs fife, fifes mischief, mischiefs
hoof, hoofs roof, roofs grief, griefs
kerchief, kerchiefs safe, safes
Irregular
man, men foot, feet mouse, mice,woman, women tooth, teeth louse, lice, child, children ox, oxen goose, geese.
The following nouns have no singular:
scissors oats tongs dregs trousers, pinchers , bellows,hears, measles mumps, victuals, tweezers, vespers.
Some nouns are always singular. Some of these nouns may be used in the plural
when different kinds are meant as sugars, coffees, cottons, gold, silver, wheat, corn, molasses, copper, sugar, cotton,news, gallows, mathematics, ethics (other words ending in ics)
*Singular nouns use this and that.
*Plural nouns use these and those.