In our grammar potion, every ingredient must work in harmony. One of the most important relationships is between the subject noun and its verb.
The form of the verb depends on whether the subject is singular or plural, as well as its person. In other words, the subject and verb must agree in number and person. When they do not, the sentence becomes ungrammatical—like mixing ingredients that simply do not belong together.
Singular Nouns and Plural Nouns
Countable nouns may be singular or plural.
Singular nouns name one person, place, thing, concept, or idea.
Plural nouns name more than one person, place, thing, concept, or idea.
Examples:
- one son → two sons
- one lady → three ladies
- one city → many cities
- one child → two children
Spelling Rules for Plural Nouns
These patterns help us transform one ingredient into many.
1. For most countable nouns, add –s.
- son → sons
2. Add –es to nouns ending in ch, sh, x, s, z, and ss.
- match → matches
- quiz → quizzes
Note: If ch says the /k/ sound, add –s.
- stomach → stomachs
3. Sometimes double the final s or z before adding –es.
When the noun ends in s or z, the final letter is sometimes doubled before adding –es.
- fez → fezzes
- quiz → quizzes
However, not all words follow this pattern.
- bus → buses
- gas → gases or gasses
4. When a noun ends in a consonant + y, change the y to i and add –es.
- lady → ladies
- city → cities
- baby → babies
5. When a noun ends in a vowel + y, add –s.
- ray → rays
- boy → boys
- toy → toys
6. Some nouns ending in f or fe change the f to v and add –es.
- knife → knives
- life → lives
- leaf → leaves
- wife → wives
Other nouns ending in f simply add –s.
- dwarf → dwarfs
- roof → roofs
- belief → beliefs
- chief → chiefs
7. Nouns ending in consonant + o may add –es or –s.
Some nouns ending in consonant + o add –es.
- potato → potatoes
- tomato → tomatoes
- hero → heroes
Some nouns ending in consonant + o add –s.
- piano → pianos
- photo → photos
- halo → halos
Some nouns can end in either –es or –s.
- buffaloes / buffalos
- volcanoes / volcanos
- tornadoes / tornados
8. When a noun ends in a vowel + o, add –s.
- zoo → zoos
- stereo → stereos
- radio → radios
- video → videos
9. Irregular nouns have irregular plural forms.
Some nouns do not follow the regular spelling rules. These nouns come from Middle English or other languages.
- person → people
- goose → geese
- ox → oxen
- child → children
- foot → feet
- mouse → mice
10. Some irregular nouns have the same form whether they are singular or plural. You can add a number to show how many.
- one sheep → three sheep
- one deer → five deer
- one fish → many fish
- one moose → two moose
Foreign Language Noun Plural Spelling
English borrows many words from other languages. Some borrowed words keep their original plural forms, while others follow regular English plural rules.
1. –on changes to –a.
- phenomenon → phenomena
- criterion → criteria
2. –us changes to –i.
- cactus → cacti
- focus → foci
3. –is changes to –es.
- analysis → analyses
- thesis → theses
4. –um changes to –a.
- bacterium → bacteria
- datum → data
- medium → media
Some words also have regular English plurals depending on context.
- curriculum → curricula / curriculums
5. –ex or –ix changes to –ices.
- matrix → matrices
- vortex → vortices
Some words also have regular English plurals.
- appendix → appendices / appendixes
- index → indices / indexes
6. –a changes to –ae.
- larva → larvae
Some words also have regular English plurals.
- formula → formulae / formulas
7. –eau changes to –eaux or adds –s.
- bureau → bureaux / bureaus
- chateau → chateaux / chateaus
Once you learn these patterns, you can transform singular nouns into plural nouns with confidence.
Pronunciation of Plural Endings
Plural endings are not just about spelling. They are also about sound. The way we pronounce –s or –es depends on the last sound of the word.
1. After a voiceless sound, pronounce “-s” as /s/.
A voiceless sound does not make your throat vibrate.
- lip → lips
- cat → cats
- rock → rocks
- cuff → cuffs
- month → months
2. After a vowel or voiced sound, pronounce “-s” or “-es” as /z/.
Put your hand on your throat when you say these words. You should feel vibration at the end of the singular word.
- bee → bees
- potato → potatoes
- sum → sums
- can → cans
- cab → cabs
- thing → things
- lid → lids
- bear → bears
- hive → hives
Note: In hive, the silent e makes no sound, so the last sound is /v/. Since /v/ is voiced, the plural ending is pronounced /z/: hives.
3. After the last sounds /s/, /sh/, /ch/, /x/, /z/, and /j/, pronounce “-s” or “-es” as /ɪz/. After certain sounds, we add an extra syllable. This ending is often pronounced /ɪz/.
- class → classes
- dish → dishes
- place → places
- beach → beaches
- tax → taxes
- garage → garages
- bridge → bridges
Note: The letter “g” can soften to the /j/ sound when followed by e, i, or y. The spelling “dge” makes the /j/ sound. The letter “c” usually makes the /s/ sound when followed by e, i, or y.
Words of Wisdom
“When you understand how words work, you gain the power to shape how others understand you.”