The word "Kada" Its Usages& Denotations

The word "Kada" has several uses and different denotations and rules that have been the interest of grammarians, whose opinions varied considerably about it. The majority hold that its predicate must be preceded by the word "An" only in poetic language, not in ordinary language, while other grammarians hold that it can be preceded by the word "Anna" in ordinary language as well.