A reflexive pronoun is a type of pronoun that is used when the subject and object of a sentence refer to the same person or thing. It reflects the action of the verb back onto the subject. Reflexive pronouns are formed by adding "-self" (singular) or "-selves" (plural) to certain pronouns. The reflexive pronouns in English are:

- Singular: myself, yourself, himself, herself, itself

- Plural: ourselves, yourselves, themselves

Here are a few examples of reflexive pronouns in sentences:

1. I hurt myself while playing soccer.

2. She talked to herself in the mirror.

3. They congratulated themselves on their success.

4. We need to take care of ourselves.

5. The cat groomed itself.

In each of these sentences, the reflexive pronoun refers back to the subject of the sentence. It emphasizes that the subject is both the doer and the receiver of the action.