If Evolution continues to take place , then why are the monkeys are not changing into human beings?

The point that stubborn creationists apparently refuse to appreciate is that only one group among the animals that we call ‘monkeys’ evolved into the animals that we call ‘apes’: other ancestral monkeys begat more monkeys, and apes are, in fact, merely one monkey lineage among several. Yes, you should think of apes as big, weird monkeys. We just use a different name for that lineage of big weird monkeys because we find this distinction a useful one. This distinction would be less obvious if early, monkey-like members of the ape lineage still existed. But they don’t; they’re extinct. So you should think of apes as monkeys in the same way that birds are dinosaurs, snakes are lizards, and humans are apes.