举例
单数
复数
boat
boats
house
houses
cat
cats
river
rivers
而以 s、x、z、ch、sh 结尾之单数名词，则要在字尾加上 es 来形成复数。
举例
单数
复数
bus
buses
wish
wishes
pitch
pitches
box
boxes
以子音 y 结尾之单数名词，要先去掉 y 再加上 ies，即可形成复数。
举例
单数
复数
penny
pennies
spy
spies
baby
babies
city
cities
daisy
daisies
不规则名词
在名词中有几个不规则复数型态，最常见的几种如下。
举例
单数
复数
woman
women
man
men
child
children
tooth
teeth
foot
feet
person
people
leaf
leaves
mouse
mice
goose
geese
half
halves
knife
knives
wife
wives
life
lives
elf
elves
loaf
loaves
potato
potatoes
tomato
tomatoes
cactus
cacti
focus
foci
fungus
fungi
nucleus
nuclei
syllabus
syllabi/syllabuses
analysis
analyses
diagnosis
diagnoses
oasis
oases
thesis
theses
crisis
crises
phenomenon
phenomena
criterion
criteria
datum
data
有些名词的单数和复数同形。
举例
单数
复数
sheep
sheep
fish
fish
deer
deer
species
species
aircraft
aircraft
不规则动词/名词的一致
有些名词具有复数型态，但使用单数型态的动词。
使用单数形动词的复数名词
例句
news
The news is at 6.30 p.m.
athletics
Athletics is good for young people.
linguistics
Linguistics is the study of language.
darts
Darts is a popular game in England.
billiards
Billiards is played all over the world.
有些名词具有固定的复数型态且使用复数型态的动词。这些名词一般不会被用在单数的情况，或即使是单数型态，也会有不同的意思。这类名词包括：trousers、jeans、glasses、savings、thanks、steps、stairs、customs、congratulations、tropics, wages、spectacles、outskirts、goods、wits 等。
使用复数形动词的复数名词
例句
trousers
My trousers are too tight.
jeans
Her jeans are black.
glasses
Those glasses are his.