My inquiry is whether or not I should use the nominative der or the accusative den in the sentence "Wann wird der (oder den) Kuchen für uns bereit sein?"
Is it accusative since the main verb in the construction "wird bereit sein" = "will be ready" is sein?
What grammatical function then do the words "wird" and "bereit" have in this sentence? Are they auxiliary verbs?
Any insight would be helpful! :)