Learning objectives
By the end of this lesson, you should be able to explain the rules, recognise the target forms in context, avoid common errors and apply the patterns to new sentences.
- Understand the core terms and distinctions.
- Study examples in complete sentences, not as isolated rules.
- Complete all 15 practice items before opening the answer key.
1. Singular and plural nouns
A singular count noun names one person or thing; a plural count noun names more than one. Most regular nouns add -s (book/books), while nouns ending in s, sh, ch, x or often z add -es (box/boxes, dish/dishes).
2. Spelling patterns and irregular plurals
Consonant + y often changes to -ies (city/cities); vowel + y usually adds -s (boy/boys). Some -f/-fe nouns take -ves (leaf/leaves), but not all (roof/roofs). Irregular forms include child/children, person/people, mouse/mice and foot/feet.
3. Uncountable nouns and plural-only forms
Advice, information, furniture, equipment and luggage are usually uncountable in standard English; use a piece/item of rather than a plural -s. Some nouns are normally plural, such as scissors, trousers and belongings.
4. Compound nouns and agreement
Pluralise the main noun in many compounds: mother-in-law/mothers-in-law, passer-by/passers-by. Some compounds take -s at the end: forget-me-nots. A noun's grammatical number affects its verb: The child is here; the children are here.
5. Gender in modern English
English commonly uses natural gender where relevant (mother/father, queen/king) and gender-neutral terms where sex or gender is irrelevant or unknown (chairperson, police officer, they). Avoid outdated assumptions that every occupation has a gendered form.
Guided practice
Try each item first. Then open the answer key and read the explanation for any answer you missed.
- The plural of “box” is ___.
- Choose the correct plural: city.
- The plural of “key” is ___.
- One child, two ___.
- The plural of “leaf” is usually ___.
- Choose the standard phrase.
- We bought two ___ of furniture.
- The plural of “mother-in-law” is ___.
- These trousers ___ expensive.
- The plural of “roof” is usually ___.
- A gender-neutral term for “policeman” is ___.
- One foot, two ___.
- Choose: The children (is/are) ready.
- I need a piece of ___.
- The plural of “passer-by” is ___.
Show answer key and explanations
- boxes — Nouns ending in x usually add -es.
- cities — Consonant + y changes to -ies.
- keys — Vowel + y usually takes -s.
- children — Child has an irregular plural.
- leaves — Many nouns ending in f change to -ves.
- some information — Information is normally uncountable.
- pieces — Use a unit expression with uncountable furniture.
- mothers-in-law — The main noun mother becomes plural.
- are — Trousers is normally plural in form.
- roofs — Roof is an exception to the f-to-ves pattern.
- police officer — The neutral occupational term is widely used.
- feet — Foot has an irregular plural.
- are — Children is plural.
- advice — Advice is uncountable in standard English.
- passers-by — The main noun passer takes the plural ending.
Revision checklist
- I can explain the main rules in my own words.
- I can recognise the correct form in a complete sentence.
- I can explain why a common incorrect form is wrong.
- I can apply the rule to a new example.
If an answer was wrong, identify the rule behind the mistake and try writing two original examples.
Continue learning
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