The type of pronoun refers to its relationship with its corresponding words. A nominative pronoun would be "she" (i.e. She goes to the store). "She" is the subject, making it a nominative pronoun. An objective pronoun would be the object of a sentence, such as "her" (i.e. The teacher gave her a book). A possessive pronoun would be something like "my" (i.e. My car is red). In this sentence, the car belongs to me, so "my" is the possessive pronoun.
