Things are not always what they seem. Look at characters, situations, and concepts of good and bad to show that this is true and find three...

That is tough -- the good vs. bad part -- because good and
bad are generally only shown through characters.  So I think you are going to have to
use characters who do things that you might think are good but are really bad (or vice
versa).

One example might be with Mrs. Dubose.  You would
think that pain is always bad, right?  But she chooses pain over morphine at the end of
her life and Atticus praises her for it.  Pain seems bad, but it is actually good
because when she is in pain, at least she is also in control of her life (as much as she
can be).

Maybe Linc Deas?  You would think that pretending
to be a drunk would be a bad thing.  But you could argue it's good because it allows him
to act the way he wants to without getting in so much trouble.