The following is my rule in post #27:
As i recall, the rule for which pronoun case to use has to do with the verb form in the sentence. As i recall, if the sentence uses a linking verb to link the predicate pronoun back to the subject of the sentence, then the predicate pronoun should be the subjective case (she). If the sentence does not use a linking verb to link the predicate pronoun back to the subject of the sentence, then the predicate pronoun should be the objective case (her). The only linking verb that matters for this rule is the linking verb that separates the subject from the predicate in the sentence, not any other linking verb in this sentence.