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Singular and Plural in English for Kids: Adding s and es, Irregular Plurals, and a and an

One cat is cat; two are cats. That little s makes all the difference, but it has a few rules and some well-known exceptions. Here are English singular and plural forms explained for kids: the five rules in a table, irregular plurals, a and an, and a drill.

By the Kitabcom Education Team · 20 October 2026

Suitable age
6 to 10 years
Suggested time
10 minutes a day for a week
After this lesson, your child can:
  • the basic rule: add s.
  • when to add es, and when y becomes ies.
  • irregular plurals: man/men, child/children, foot/feet.
  • a, an and the with singular nouns, and numbers with plurals.

Singular and Plural

Singular is one: a cat. Plural is more than one: two cats. Arabic often changes the whole word («قطة» → «قطط»), while English usually just adds a letter at the end. From the book:

The Five Rules

RuleWhenExamples
Add sMost wordscat → cats, book → books, pen → pens, dog → dogs
Add esAfter s, x, ch, shbus → buses, box → boxes, watch → watches, dish → dishes
y → iesy after a consonantbaby → babies, city → cities, fly → flies
y → ysy after a vowelboy → boys, day → days, key → keys
f → vesSome words ending in fleaf → leaves, wolf → wolves, knife → knives

For Grades 1 and 2: the first rule is enough (add s). The rest are for Grade 3 and up.

Irregular Plurals: Learned by Heart

SingularPluralArabic
manmenرجل / رجال
womanwomenامرأة / نساء
childchildrenطفل / أطفال
footfeetقدم / أقدام
toothteethسن / أسنان
mousemiceفأر / فئران
fishfishسمكة / سمك
sheepsheepخروف / خراف

Teach them with the body: one foot, two feet (raise one foot, then both), one tooth, many teeth (open wide). And from the body lesson: and .

a, an and the

  • a with a singular noun starting with a consonant sound: a cat, a book, a pen.
  • an with a singular noun starting with a vowel sound (a e i o u): an apple, an egg, an orange.
  • the for something we already know about, singular or plural: the cat, the cats.
  • Plurals take no a: we say cats or two cats, not a cats.

Drill

Write the pluralAnswer
one apple → two ______apples
one box → three ______boxes
one baby → two ______babies
one child → four ______children
one foot → two ______feet
one day → seven ______days

Common Mistakes

  • two cat → two cats: after a number, use the plural.
  • childrens → children: irregular plurals take no s.
  • a apple → an apple.
  • three fishes → three fish.

More practice in the Grade 2 worksheets, and the same words with audio in the animals and toys lessons.

🏠 Try It at Home Today

Hold up one toy, then two: one car, two cars. Five toys is enough for today.

🏫 For Teachers in Class

Each child holds up one pencil, one pen, then two, two pens, and the class says the plural together.

Summary

  • Singular means one; plural means more than one: cat → cats.
  • The rule: add s. After s, x, ch and sh, add es: box → boxes.
  • y after a consonant becomes ies: baby → babies.
  • Some words don’t follow the rule and are learned by heart: man → men, child → children.

Frequently Asked Questions

How do you make a word plural in English?

Usually by adding s: cats. After s, x, ch and sh, add es: boxes. If a word ends in y after a consonant, change it to ies: babies. Some words are irregular and learned by heart: children, men, feet.

What’s the difference between a and an?

Both mean “one” and go only with singular nouns. an comes before a word starting with a vowel sound (a e i o u): an apple, an egg. a comes before the rest: a cat.

Do we say two cats or two cat?

two cats. After any number above one, the noun is plural. Arabic-speaking children often drop the s, because Arabic has a special dual form for two («قطتان»).

How is the plural s pronounced?

Three ways: “s” after quiet sounds (cats), “z” after voiced sounds (dogs), and “iz” with es (boxes). Don’t worry: children pick it up by ear.

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