Nouns That Do Not Change: One Sheep, Two Sheep

ByKhamis Maiouf
🌿 A2 · ELEMENTARY
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Quick Answer

Some English nouns look exactly the same for one and for many: one deer, two deer. You do not add anything. The words around them — one/two, is/are, this/these — tell the reader how many there are.

See the Pattern First

Nothing changes on the noun. Everything changes around it.

  • One deer is eating. Five deer are eating.
  • This species is rare. These species are rare.
  • He caught one salmon. He caught nine salmon.
  • The aircraft was late. All aircraft were late.

The noun keeps the same spelling in these examples. Check the number word, this/these and the verb to see whether the meaning is singular or plural.

Examples of Nouns That Can Keep the Same Form

The table shows an unchanged plural for each noun. Some also have other accepted plural forms; see the notes below. This is a set of examples, not a rule for all animal names.

OneManyOneMany
aircraftaircraftbisonbison
buffalobuffalodeerdeer
elkelkmoosemoose
salmonsalmonseriesseries
shrimpshrimpfishfish
speciesspeciesswineswine
trouttrouttunatuna
sheepsheepoffspringoffspring

These come up often, so they have their own full lesson with more practice: the plural of sheep and the plural of offspring.

Learn the Noun and Its Plural Together

Some animal names use the same form for one or many: one sheep, five sheep. Other animal names add an ending: one horse, five horses. Learn each noun with its plural; the meaning “animal” does not predict the form.

Series and species end in -s in both singular and plural use. The ending alone does not tell you the number: this series is, but these series are.

The noun stays still. Is/are does the work.

Where People Get Caught

Some words have more than one accepted plural. Uncountable nouns need a different explanation:

  • Alternative plurals: Both shrimp and shrimps can count the animals. Both buffalo and buffaloes are accepted. Fish is the usual plural for individual fish; fishes is often used for different species.
  • Software is uncountable: say some software, one software program or three pieces of software. It does not work like one sheep, three sheep.

Compare Three sheep are in the field with The software is ready. We count sheep directly. To count separate programs, say Three software programs are ready.

Mistakes Learners Make (You Are Not Alone)

Practise these common plural forms:

  • ✗ two deers → ✓ two deer
  • ✗ many sheeps → ✓ many sheep
  • ✗ several softwares → ✓ several software programs (software cannot be counted directly)

Adding -s here is a very logical mistake — you are applying the normal rule. English is simply being inconsistent, and that is not your fault.

Your Turn — Quick Quiz

Five questions. Take your time — the table above is still there if you need it.

Question 1 of 5

1. We saw three ____ in the forest.

2. Which sentence is CORRECT?

3. The company bought two new ____.

4. He watched all six ____ of the show.

5. The farmer keeps forty ____.

Keep Going

You have now met words that change a lot and words that do not change at all.

Another useful group changes a vowel: foot → feet and goose → geese. Practise these in the next lesson.

Next lesson: Irregular plurals: foot → feet, goose → geese

Sources

Reference: Cambridge Dictionary — shrimp.

Reference: Cambridge Dictionary — buffalo.

Reference: Cambridge Dictionary — software.

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