Can is be objective case

Answer 1

"Is" cannot be objective case, because "is" is a verb. Verbs have tense, number, and voice ("is" is present tense, singular, active--although forms of "to be" are typically an element in the formation of passive constructions in English). Nouns & pronouns (and in some theoretical sense adjectives) have case (& number & gender). When "is" and other forms of "to be" are the predicate verbs is sentences, they typically will not take a direct object; rather "is" will be followed by a noun or pronoun called a predicate nominative which refers back to the sentence's subject, or by an adjective called a predicate adjective which modifies or limits the sentence's subject. Thus "Mary is a student." "John is tall." Both 'student" & "tall" are in the nominative (subject) case. That's why in response to the question, "Is Pat here?" the correct answer is "I am he (or she)," NOT "I am him(/her)." Although in casual quotidian conversation, "That's me" is acceptable, and "That is I" may sound a bit affected. One caveat--the subjects and objects of infinitives are always objective/accusative case, so "I don't want to be President, the President wants to be me" is correct, as is, "I want him to be President," where "him" is the subject of the infinitive "to be."