One and Ones

Pronouns

We use one and ones to avoid repeating unnecessary words (a singular or plural countable noun).

• One is used instead of singular countable nouns.
• Ones is used instead of plural countable nouns.

For example:
— “There is a phone on the table. The black one is mine.” = Phone is a singular countable noun.
— “There are 3 phones on the table. The black ones are mine.” = Phones is a plural countable noun.

Exercises

One and Ones