Most German verbs take accusative object (e.g.: etw. Akk. schreiben). Some take dative object (e.g.: etw. Dat. entsprechen). A small number of verbs require genitive object (e.g.: etw. Gen. bedürfen, etw. Gen. gedenken, etw. Gen. harren). But I can think of only one verb, sein (etw. Nom. sein), that takes the nominative case.
Are there any other German verbs that take this form: etw. Nom. verb?
Is there a reason why only one verb in the entire German language—or so few of them, if there are any other—takes the nominative case?
A ist B
construction has no object. Is this taught in German grammars as having an object?