Theirs is the possessive pronoun of they, and it is third-person plural. In this lesson, we will discuss when and how to use it.

'Theirs' as a Possessive Pronoun

Use

Theirs as a possessive pronoun is used to refer to the possessions of 'they.' Here are more uses of theirs:

Theirs is used to talk about possession and ownership. Here are some examples:

Example

If there is a blue mark on any plate, it is theirs.

'Theirs' replaces 'a blue mark.'

I broke a glass and I think it was theirs.

Theirs is used to talk about relationships, such as family, friends, colleagues, etc. For example:

Example

I have met everyone's parents except for theirs.

'Theirs' replaces 'parents.'

Our friends are always fighting with theirs.

Theirs can be used to talk about body parts. For example:

Example

Our eyes see very differently than fish's eyes. Theirs are more like birds.

'Theirs' means 'their eyes.'

Theirs can be used to talk about thoughts, feelings, ideas, etc. Take a look at the following examples:

Example

These ideas are much better than theirs.

'Theirs' refers to 'ideas.'

Theirs can be used to refer to a general group of people, such as:

Example

Every person likes freedom and it will be theirs if they fight for it.

'Theirs' is generic and refers to 'every person.'

There is a bag here. Last night someone came here and I think this is theirs.

Position in a Sentence

Theirs as a possessive pronoun replaces the noun. Remember that the verb after theirs agrees with the antecedent (the noun it replaces). For example:

Example

I have met everyone's parents except for theirs.

'Theirs' replaces 'everyone's parents.'

I have three books but theirs are totally different.

The verb after 'theirs' agrees with the noun it replaces.

Indefinite Pattern

The indefinite pattern 'determiner + noun + of theirs' is used to show something belongs to someone. Pay attention to the following examples:

Example

This is a car of theirs.

'A car of theirs' is indefinite because we do not know which car.

That friend of theirs is such a loser.

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