Subject Complement is a word or phrase that follows a linking verb (like "be", "seem", "become", etc.) and renames or describes the subject.
Here are some examples:
* It is he. (The pronoun "he" renames the subject "it")
* The winner is she. (The pronoun "she" renames the subject "The winner")
* My best friend is him. (The pronoun "him" renames the subject "My best friend")
* That person seems she. (The pronoun "she" describes the subject "That person")
Let me know if you'd like to explore more examples or have any other grammar questions!