Plural forms of nouns
1) Most singular nouns form the plural by adding ‘-s’.
e.g.
boat | boats |
cat | cats |
river | rivers |
car | cars |
house | Houses |
book | books |
bird | birds |
pencil | Pencils |
2) A singular noun ending in ‘s, x, z, ch, sh’ mostly makes the plural by adding ‘-es’.
e.g.
bus | buses |
wish | wishes |
pitch | pitches |
box | boxes |
church | churches |
wish | wishes |
match | matches |
fox | foxes |
3) There’s one exception to this rule. If the ‘-ch’ ending is pronounced with a ‘k’ sound, add ‘-s’ rather than ‘-es’:
e.g.
stomach | stomachs |
epoch | epochs |
4) A singular noun ending in a consonant and then ‘y’ makes the plural by dropping the ‘y’ and adding ‘-ies’.
e.g.
penny | pennies |
spy | spies |
baby | babies |
city | cities |
daisy | daisies |
berry | berries |
activity | activities |
5) With nouns that end in a consonant or a single vowel plus ‘-f or -fe’, change the ‘-f or -fe’ to ‘-ves’:
e.g.
knife | knives |
half | halves |
scarf | scarves |
6) Nouns which end in two vowels plus ‘-f’ usually form plurals in the normal way, just add ‘-s’:
e.g.
chief | chiefs |
spoof | spoofs |
7) Nouns ending in ‘-o’ can add either ‘-s or -es’ in the plural:
e.g.
solo | solos |
zero | zeros |
echo | echoes |
hero | heroes |
8) Those which have a vowel before the final ‘-o’ always just add ‘-s’:
e.g.
studio | studios |
zoo | zoos |
embryo | embryos |
9) Here’s a list of the most common nouns ending in ‘-o’ that are always spelled with ‘-es’ in the plural:
e.g.
buffalo | buffaloes |
domino | dominoes |
echo | echoes |
embargo | embargoes |
hero | heroes |
mosquito | mosquitoes |
potato | potatoes |
tomato | tomatoes |
torpedo | torpedoes |
10) Here are some of the common nouns ending in ‘-o’ that can be spelled with either ‘-s or -es’ in the plural:
e.g.
mango | mangos or mangoes |
memento | mementos or mementoes |
motto | mottos or mottoes |
tornado | tornados or tornadoes |
volcano | volcanos or volcanoes |
11) Plurals of foreign nouns
The plurals of words which have come into English from a foreign language such as Latin or Greek often have two possible spellings: the foreign plural spelling and an English one.
e.g.
Word | Foreign word plural | English plural |
antenna | antennae | antennas |
appendix | appendices | appendixes |
cactus | cacti | cactuses |
curriculum | curricula | curriculums |
formula | formulae | formulas |
index | indices | indexes |
terminus | termini | terminuses |
thesaurus | thesauri | thesauruses |
vortex | vortices | vortexes |
Note that there are a few nouns which have come into English from Latin which should always form their plural in the Latin way.
e.g.
alga | algae |
alumnus | alumni |
larva | larvae |
12) Irregular nouns
e.g.
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 |
focus | foci |
fungus | fungi |
nucleus | nuclei |
syllabus | syllabi or syllabuses |
thesis | theses |
crisis | crises |
phenomenon | phenomena |
criterion | criteria |
datum | data |
apex | apices |
curriculum | curricula |
datum | data |
focus | foci |
series | series |
vita | vitae |
index | indices |
ellipsis | ellipses |
codex | codices |
alumni | alumnae |
ox | oxen |
oasis | oases |
larva | larvae |
diagnosis | diagnoses |
analysis | analyses |
13) Some nouns have the same form in the singular and the plural.
e.g.
aircraft | aircraft |
fish | fish |
deer | deer |
sheep | sheep |
species | species |
Plural forms of nouns: Read and Remember
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