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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




Hello yun samaniah,
The clue is in the phrase: 'one of those...' tells us that you are talking about one thing, not many, so the verb should be singular:
'One of those factories is a soybean factory.'
You need an indefinite article as well because it is the first time it has been mentioned.  If you had talked about the soybean factory before then you might say 'the'.  For example:
'I work in a soybean factory.  One of those factories is the soybean factory.'
I hope that clears it up for you.
Best wishes,
The LearnEnglish Team

I'm very of been a part of this site......for corrections.

good exercise

hi thank you to have this site for all people who want to learning grammar. To day getting there, but not 100?% but keep going not give up.

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Hello Arnold 9595!
Thanks for your kind words - great to hear that you find the website so useful!
Good luck with your studies!
The LearnEnglish Team

I m jst enjoying doing these exercises.........thanks a ton

it `s  nice

For in my inner being i delight in God's work to do his expectation

I didn't understand nothing. Your english is so hard...