303. Use the nominative case for a predicated pronoun after is, are, was, were, etc.
Wrong. It was me.
Right. It was I.
Wrong. The best friends I have are her and him.
Right. The best friends I have are she and he.
Revise. It is not whom you think it is.
304. Put a pronoun used as an appositive into the same case as the noun with which it is in apposition.
Wrong. Let’s you and I go.
Right. Let’s you and me go.
Wrong. The principal called in several pupils, Jack and Mary and I.