For example:
Does he be a hero?
instead of
Is he a hero?
.
He doesn't be good as you thought
instead of
he isn't good as you thought.
.
The memories don't be real
instead of
The memories aren't real.
You use do in all questions in simple present and simple past, but why don't you use it for the word 'be'?
Best Answer
The rule is that in "transforming" a declarative sentence into a question (or a negation), the subject inverts with the auxiliary verb.
If there is no auxiliary verb present in the declarative form, the appropriate form of DO is brought in as a 'dummy' auxiliary.
But BE is always treated like an auxiliary verb, even when it is the only verb present in the declarative form.
Note that until quite recently HAVE could be treated the same way as BE—even today you find speakers inverting non-auxiliary HAVE with the subject, though it is becoming rare.
The same considerations apply with negations.