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'one' and 'ones'

Level: beginner

We use one (singular) and ones (plural):

See those two girls? Helen is the tall one and Jane is the short one.
Which is your car, the red one or the blue one?
My trousers are torn. I need some new ones.

See those two girls? Helen is the one on the left.
Let's look at the photographs – the ones you took in Paris.

after which in questions:

You can borrow a book. Which one do you want?
Which ones are yours?

one and ones 1


one and ones 2




Please help me to answer my curiosity Dear Kirk. on above exercise, point number 2

2. The new mobiles are much lighter the old ....(ones)

Question: why the correct answer is singular (one)? my answer was plural (ones) because I saw previous sentence are plural (new mobiles are.......)

Thank you very much :)

Hello aimee_auzzie,

I've checked the exercise and the correct answer to Q2 is 'ones', not 'one'.  Could you check again please?  Perhaps you misread it.

Best wishes,



The LearnEnglish Team


Sir is this sentence is correct?
I need some new glasses. The ones i have at the moment are broken.

when i read the sentence it seems to be incomplete...


Hi peter,
"The ones i have at the moment are broken". starts with "the ones"? when i read this it's look like incomplete sentence.

Hi Arumugam,

As is explained above, one or ones are often used to avoid repeating other nouns. In sentence 5, the ones takes the place of and refers to the glasses in the previous sentence.

I can understand that it may sound strange to you, but please know that it is very common in both written and spoken English!

Best wishes,

The LearnEnglish Team

Hi Arumugam,

The sentence is fine, and not incomplete at all.  If you wish to tell us why you thought it was incomplete then we would be happy to explain further.

Best wishes,



The LearnEnglish Team

what is the meaning of the question - "who did you see?"
is this same as "whom did you see?"

and i've heard that "DO" is not used in questions starting with who, what and which as their subject.
ex: what happened?

and "DO" is used if - who, what and which is object of the sentence (question).

could you please explain them with few examples...... Thank you.....


Hi Krishna,

The word whom is used to refer to the object of a verb, but is rarely used in informal modern English. So the two questions you ask about mean the same thing, but the first one is the way this question is asked most of the time.

What you write about the auxiliary verb do in questions is correct. Continuing with the example you gave, in the following questions:

Who did you see at the cafe?  (who is the object and you is the subject of the verb)
Who saw you at the cafe?  (who is the subject and you is the object of the verb)

If you have any further questions, please don't hesitate to ask us.

Best wishes,

The LearnEnglish Team

i love this topic :)

it's great