What is the correct form of the pronoun in the sentence: "She gave the book to I/me"?

The correct form of the pronoun in the sentence "She gave the book to I/me" is "me." This is because "me" functions as the object of the preposition "to." In English grammar, the pronouns "I," "you," "he," "she," "it," "we," and "they" are commonly used as subjects of verbs, whereas "me," "you," "him," "her," "it," "us," and "them" are used as objects.

Therefore, in this context, since the pronoun is receiving the action of the verb (the book being given), "me" is the appropriate choice. This adheres to the rule that pronouns must match their function in the sentence, ensuring clarity and grammatical correctness.