One and Ones in English (with Clear Examples)

Today we’re looking at two small but very useful words in English: one and ones.

They may look simple, but they perform several important functions — especially in formal English and when we want to avoid repetition.

Let’s break everything down step by step.

“One” Meaning “People in General” (Formal English)

We use one as a pronoun meaning “anyone” or “people in general” in formal situations. It sounds polite, impersonal, and slightly traditional.

It is often used in written English, academic contexts, or formal speech.

Structure:

One + verb

One’s + noun

Example:

I like to go on a picnic in this area, although there are no shops here and one has to take one’s own food and drinks from home.

Notice:

• one has (not one have)
• one’s own (possessive form)

More examples:

• One should always arrive on time for an interview.
• One never knows what might happen.
• One must consider all the options carefully.

Important:

In everyday English, we usually replace one with you.

Compare:

Formal:

One should respect other people’s opinions.

Informal:

You should respect other people’s opinions.

Formal English is still valuable — especially for exams like B2 First or C1 Advanced — but in daily conversation, you sounds much more natural.

Using “One” to Avoid Repeating a Singular Countable Noun

We often use one instead of repeating a singular countable noun. This makes sentences smoother and more natural.

Structure:

Adjective + one

Examples:

• Don’t buy that dress. Buy the blue one.
• I have two tables: a new one and an old one.
• The old one is much prettier than the new one.
• This phone is broken. I need a new one.

Without “one,” we would have to repeat the noun every time:

Buy the blue dress.

I have a new table and an old table.

That sounds repetitive and heavy. English prefers elegance!

Using “Ones” to Avoid Repeating Plural Countable Nouns

We use ones in the same way — but for plural countable nouns.

Structure:

Adjective + ones

Examples:

• I have new trainers — the ones over there.
• These are lovely photos. The ones you took on holiday.
• I don’t like the black shoes. I prefer the brown ones.
• The small cakes are nicer than the big ones.

Again, this avoids repetition:

I prefer the brown shoes (instead of repeating “shoes”).

“One” and “Ones” for People AND Things

Although many learners think these words are only for objects, they can also refer to people.

Examples:

• Which computer are you using?
  – The one you gave me.
• That is our new manager — the one in the blue shirt.
• I met two candidates. The experienced one seemed more confident.

So remember:

They can refer to people, objects, or animals, as long as the noun is countable.

After “Which”, “This”, “That” and Adjectives

We commonly use one / ones after:

• which
• this
• that
• adjectives

Examples:

• Which one do you prefer?
• This one is mine.
• That one looks expensive.
• I’d like a red one, please.
• Which ones are yours?
• The large ones are more comfortable.

This structure is extremely common in everyday English.

Avoid “Ones” After “These” and “Those”

In most cases, we do not use “ones” after “these” or “those.”

Instead, we simply say:

• I want these.
• I’ll take those.
• These are better.
• Those look expensive.

❌ Not natural:

• I want these ones.
• I prefer those ones.

(Some native speakers do say this in informal speech, but in exams and standard English, it’s best to avoid it.)

Do NOT Use “One” with Uncountable Nouns

This is very important.

We only use one / ones with countable nouns.

We do NOT use them with uncountable nouns.

Example:

Incorrect:

That water is dirty. Take a fresh one. ❌

Correct:

That water is dirty. Take fresh water.

That water is dirty. Take some fresh water.

Other examples:

• I need advice. (not an advice or a new one)
• This furniture is old. (not an old one unless referring to a specific item like “a chair”)

If the noun is uncountable, either:

• repeat the noun
• or omit it completely

Quick Summary

Use one:

✔ for formal “people in general”

✔ to replace a singular countable noun

✔ after adjectives, which, this, that

Use ones:

✔ to replace plural countable nouns

Avoid:

✘ using them with uncountable nouns

✘ using “ones” after these/those in standard English

Small words. Big difference.

Mastering one and ones will make your English smoother, more precise, and more natural — especially in speaking and writing exams.

Related posts:

Countable and Uncountable Nouns

All, Every, Each, Both

Phrasal Verbs to Use in Formal Writing

Plural of Nouns in English

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