posted by rfvv .
1. He may not be rich.
2. He can not be rich.
(Are both the same or different? If they are different, why is that?)
they are different because may gives a chance of it being a probability and writting can not is a statement and can not is more impulsive to say.
Brenda is right. Those sentences are not exactly alike.
"may" means there's a possibility of the statement's being true.
"can" means he is able to do or be something.
These sentences have "not" in them, of course, making them negative.