Final answer:
The pronoun 'SHE' in the provided sentence is a subjective case pronoun because it serves as the subject of the sentence, performing the action of the verb.
Step-by-step explanation:
In the given sentence, 'SHE gave a good book report.', the pronoun in all capital letters is 'SHE'. This pronoun is a subjective case pronoun because it functions as the subject of the sentence. The subject of a sentence is the person, place, or thing that performs the action or is described by the verb. In this case, 'SHE' performs the action of giving a book report. Other subjective case pronouns include I, we, you, he, she, it, and they. It is important to use the correct pronoun case depending on the role the pronoun plays in the sentence.