Here are some specific situations:
* To add emphasis to the subject: "I myself baked the cake." (emphasizes that *I* did the baking)
* To clarify the subject: "The president himself announced the new policy." (emphasizes that the president, not someone else, made the announcement)
* To show a contrast: "The dog itself ate the entire bone." (emphasizes the dog, contrasting it with other potential eaters)
* To add formality or seriousness: "The committee itself decided on the final outcome." (emphasizes the committee's authority)
Remember: Intensive pronouns are formed by adding *self* or *selves* to a reflexive pronoun (e.g., myself, yourself, himself, herself, itself, ourselves, yourselves, themselves).
Here are some examples of intensive pronouns in sentences:
* She herself wrote the entire book.
* The children cleaned the house themselves.
* The mayor, himself, promised to address the issue.
* We ourselves will decide on the next course of action.
While not strictly necessary, intensive pronouns can add emphasis and clarity to your writing.