One and ones as substitution — englishillustrated.com

What are 'one' and 'ones'?

'One' and 'ones' are pronouns that replace countable nouns to avoid repeating the same word. We use 'one' for singular nouns and 'ones' for plural nouns. This substitution makes your sentences shorter and more natural. For example, instead of saying 'I like this coffee and that coffee,' you can say 'I like this coffee and that one.'

When to use 'one' and 'ones'

Use 'one' or 'ones' when the noun is already clear from context. The noun should be countable (like 'book,' 'car,' 'idea'), not uncountable (like 'water' or 'information'). You can use adjectives before 'one' or 'ones' to describe which noun you mean. For example: 'I want the red one' or 'These are the best ones.' This is very common in spoken English and informal writing.

Important rules to remember

Do not use 'one' or 'ones' if the noun is not clear. Never use them with uncountable nouns. You can combine 'one/ones' with demonstratives (this, that, these, those), possessives (my, your, his), or relative clauses (who, that). For example: 'the one I like,' 'my ones,' 'those ones.' The article 'the' is often used before 'one' or 'ones' to make the reference specific.

How Substitution Works: The Formula

Positive

Subject + Verb + Determiner + (Adjective) + one / ones + (Relative clause)

I want the blue one that is on the shelf .

↑ "one" replaces the singular noun bag

Negative

Subject + Aux. Verb + not + Verb + Determiner + (Adjective) + one / ones

She does not like the cheap ones .

↑ "ones" replaces the plural noun shoes

Question

Aux. Verb + Subject + Verb + Wh- / Determiner + (Adjective) + one / ones + (Relative clause) ?

Would you prefer the red one over there ?

↑ "one" replaces the singular noun book

Examples

I have two pens, but I prefer the red one.

Singular · Replacing 'pen'

These cookies are good, but those ones are better.

Plural · Replacing 'cookies'

Which laptop do you want? The expensive one or the cheap one?

With adjectives · Everyday conversation

My sister has three dogs. The ones she loves most are the small ones.

Plural · Multiple uses in one sentence

Do you like the idea I suggested? No, I prefer the one that Maria mentioned.

With relative clause · Formal usage

I need new shoes. These old ones are uncomfortable.

Demonstrative + plural · Common in daily English

When to use it

Shopping

When asking about products, use 'one' or 'ones' to avoid repeating the item name.

"I'll take the blue shirt, not the red one."

Comparing people or things

Use 'one' or 'ones' to compare two similar items quickly and naturally.

"My car is faster than the ones my friends have."

Casual conversation

In spoken English, 'one' and 'ones' help make your speech more fluent and less repetitive.

"These cookies taste better than the ones from yesterday."

Formal writing

Use 'one' or 'ones' in essays and professional writing to avoid noun repetition.

"The solution that was proposed is more effective than the one we discussed earlier."

Signal words

the one the ones this one that one these ones those ones my one your ones which one the one who the one that

Common Mistakes

Wrong

I like this water and that one.

✓

Correct

I like this water and that water. (or I like this one and that one if referring to bottles)

'Water' is uncountable, so 'one' cannot replace it. Use 'one' only for countable nouns.

Wrong

The ones I bought yesterday are from the ones shop.

✓

Correct

The ones I bought yesterday are from the shoe shop.

'Ones' cannot replace a noun in the second phrase because the context is unclear. Repeat the noun or use a different structure.

Wrong

Which one of these books do you like? The blue one is my favorite.

✓

Correct

Which of these books do you like? The blue one is my favorite.

Use 'which' without 'one' when asking about a group. Use 'one' in the answer instead.

Wrong

I want that one there one.

✓

Correct

I want that one there. (or I want the one over there.)

Do not use 'one' twice in the same phrase. Choose one way to express your meaning.

KEY TAKEAWAYS

What to Remember

Use 'one' for singular countable nouns and 'ones' for plural countable nouns to avoid repetition.
Only use 'one' or 'ones' when the specific noun is already clear from the previous context.
Never use 'one' or 'ones' to replace uncountable nouns like water, information, or furniture.
The noun being replaced must be countable, such as book, car, idea, or person.
One and ones make sentences shorter and more natural by eliminating unnecessary noun repetition.

← Previous

Substitution with so and not (I think so)

Ellipsis and substitution in writing