Superphysics Superphysics
Chapter 4

Plural Forms Of Nouns

by PR Sarkar Icon
4 minutes  • 652 words
Table of contents

When a word denotes only one object, it is singular in number. When it denotes more than one object, it is plural in number.

Rule 1

The general rule for forming plurals is to add -s to the word in the singular number:

SINGULAR PLURAL
dog dogs
book books
hand hands
house houses
town towns
village villages

Exceptions: If the noun ends in -ss, -sh, -ch, -x or -z, the plural is formed by adding -es to the singular:

SINGULAR PLURAL
class classes
glass glasses
bench benches
brush brushes
box boxes
fox foxes
topaz topazes

Rule 2

If the last letter of the noun is -y and if -y is preceded by a consonant, the plural is formed by changing -y into -ies:

SINGULAR PLURAL
fly flies
sky skies
lady ladies
family families
city cities

But if the final -y is preceded by a vowel, the plural is formed by adding only -s to the word in the singular number:

SINGULAR PLURAL
day days
tray trays
key keys
monkey monkeys
boy boys
toy toys

Rule 3

If the last letter of a noun is -o and if -o is preceded by a consonant, the plural is usually formed by adding -es to the singular:

SINGULAR PLURAL
hero heroes
buffalo buffaloes
echo echoes
mango mangoes
mosquito mosquitoes
potato potatoes

a. Some exceptions: cantos, mementos, solos, pianos, provisos.

b. The plural of nouns ending in -oo, -io, -eo and -yo is formed by adding -s and not -es:

SINGULAR PLURAL
bamboo bamboos
cuckoo cuckoos
portfolio portfolios
cameo cameos
embryo embryos

Rule 4

If a noun ends in -f or -fe, the plural is generally formed by changing -f or -fe into -ves:

SINGULAR PLURAL
life lives
wife wives
calf calves
knife knives
leaf leaves
wolf wolves
thief thieves

Exceptions: The plural of nouns ending in -ief, -ff, -oof, -rf, -eef, is formed by adding only -s to the word in the singular number:

SINGULAR PLURAL
chief chiefs
cliff cliffs
proof proofs
dwarf dwarfs
reef reefs

Rule 5

There are eight nouns which form their plurals by changing the inside vowels(s):

SINGULAR PLURAL
man men
woman women
foot feet
tooth teeth
goose geese
mouse mice
louse lice
dormouse dormice

Rule 6

There are some nouns which form their plurals by adding -en.

SINGULAR PLURAL
child children
ox oxen
brother brethren (brothers)

Rule 7

In the case of compound nouns, plurals are fomrned by adding -s to the principal word:

SINGULAR PLURAL
father-in-law fathers-in-law
daughter-in-law daughters-in-law
passer-by passers-by
step-brother step-brothers
commander-in-chief commanders-in-chief

Rule 8: Some nouns are singular in form but plural in meaning: cattle, people, swine, vermin, gentry, nobility, aristocracy, clergy, folk, etc.

The Kaoravas wanted to steal the cattle of King Virata. Virtuous people get peace in life.

Rule 9: Some nouns are plural in form but singular in meaning: mathematics, physics, politics, economics, whereabouts, gallows, ethics, etc.

Rule 10

Some nouns have no plural form: alphabet, furniture, poetry, scenery, offspring, luggage, expenditure, issue (in the sense of child or children).

Rule 11

a. Some nouns have only plural form: alms, annals, assets, bellows, riches. b. Some nouns have plural form but are used in the singular: means, news, innings.

Rule 12

Some nouns have double plural forms but with different meanings:

fish (many fish of the same variety) fishes (many fishes of different varieties) people (many people live in Calcutta) peoples (nations – many peoples of the world) System of Making Latin Plurals

For Latin words ending in -um in the singular number, the plural is formed by replacing -um with -a.

SINGULAR PLURAL
vitum vita
stratum strata
datum data
memorandum memoranda
microvitum microvita
medium media
cash memo cash mema
quantum quanta
corrigendum corrigenda
propagandum propaganda
agendum agenda
desideratum desiderata

For Latin words ending in -us in the singular number, the plural is formed by replacing -us with -i:

SINGULAR PLURAL
radius radii
lotus loti
cactus cacti
plexus plexi
genius genii
alumnus alumni

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