one book → two books
Grammar · A1
Plural nouns
Say one thing, then two or more things.
one child → two children
01 · The idea
Look. Compare these examples.
Say one thing, then two or more things.
one city → two cities
one child → two children
02 · More examples
Look at what changes.
For two or more, many words add s. Some add es.
one book → two books
one box → two boxes
one watch → two watches
City changes to cities. Toy changes to toys. Learn the whole pair.
one city → two cities
one toy → two toys
one knife → two knives
These pairs are different. Learn them with a number.
one child → two children
one person → two people
one foot → two feet; one sheep → two sheep
Look a little closer
More word pairs
Learn each pair with one and two.
one man → two men; one woman → two women
one tooth → two teeth; one wife → two wives
one baby → two babies; one family → two families
one mouse → two mice; one leaf → two leaves
03 · Build a sentence
Make a choice. See what changes.
Change one choice at a time. Watch the sentence blocks.
I can see one book.
What?
How many?
04 · Try it together
Choose the correct answer.
Quick check 1
I have three ___. (book)
Count the things. Is it one, or more than one?
Quick check 2
They live in different ___. (city)
Compare one city and two cities. Watch the end of the word.
Quick check 3
The ___ are playing. (child)
This word has a special one/two pair. Try saying the pair aloud.
05 · Real-life English
Use it in a conversation.
A: One apple or two apples? B: Two apples, please. A: Anything else? B: Three oranges, please.
Make a shopping list. Ask a partner for one thing, then two or three.
A: How many people are coming? B: Four adults and two children. A: We need six chairs.
Plan a meal for a family. Say how many people and children are coming.
06 · Common mistakes
Which sentence is correct?
07 · Keep this
The lesson in three small steps.
One book. Two books.
one book → two books; one box → two boxes
Watch the ending
one city → two cities; one toy → two toys
Some words change more
one child → two children; one person → two people
08 · Practice
Ready to try?
Choose mixed practice or one type of activity.
RecommendedMixed practiceTry all three activity types.Start →Multiple ChoiceChoose the answer →Fill in the BlanksType the missing word →Sentence OrderingPut the words in order →
Choose Practice Mode or Test Mode on the next page. Mixed sessions: 5, 10, 15, 20 or 25 questions. The same five sizes are available for each activity type.