Explain the usage of possessive pronouns as determiners.

Possessive pronouns can be used as determiners to indicate ownership or possession of a noun. They are used to show that something belongs to someone or something else.

The possessive pronouns that can be used as determiners are: my, your, his, her, its, our, and their. These pronouns are used before a noun to specify who the noun belongs to.

For example:
- "This is my car." In this sentence, the possessive pronoun "my" is used as a determiner to show that the car belongs to the speaker.
- "Is this your book?" Here, the possessive pronoun "your" is used as a determiner to indicate that the book belongs to the person being addressed.
- "His house is very big." In this sentence, the possessive pronoun "his" is used as a determiner to show that the house belongs to a male person.
- "Their dog is very friendly." Here, the possessive pronoun "their" is used as a determiner to indicate that the dog belongs to a group of people.

Possessive pronouns as determiners can also be used without a following noun, in which case they function as pronouns rather than determiners. For example:
- "Is this pen yours?" In this sentence, the possessive pronoun "yours" is used as a pronoun to replace the noun "pen" and indicate ownership.
- "The blue car is mine." Here, the possessive pronoun "mine" is used as a pronoun to replace the noun "car" and show ownership.

In summary, possessive pronouns can be used as determiners to indicate ownership or possession of a noun. They are placed before the noun they modify and show who the noun belongs to.