We caught the man who stole our car. The winners are they. Use the subjective case when the pronoun is an appositive identifying a subject or subject complement. Two people, Sara and she, worked late. The singers, Sammy and he, won an award.
Objective Case Use the objective case when the pronoun is a direct object or an indirect object.
Lisa likes me. Lisa likes Bill and him. We gave them the ball. Use the objective case when the pronoun is the object of a preposition. Harold walked to the store with us.