¿Cuál es la diferencia entre Bob may still be sleeping. y Bob may still sleep. ?Puedes dar oraciones como ejemplo.

"Bob may still be sleeping" implies that Bob might still, at this moment, be sleeping.

"Bob may still sleep," on the other hand, implies Bob is thinking about sleeping, but hasn't decided if he will or not, (i.e. "Bob might sleep, but we don't know").

Example Sentences:

"Alice may still be eating" - Alice is eating, right now, as we speak.
"Alice may still eat" - Alice isn't eating right now, but she might start eating soon, or not. We don't know yet.

My Japanese is poor, but it might roughly translate like:

"アリスはまだ食べているかもしれません。"
vs.
"アリスはまだ食べるかもしれない。"

I hope that doesn't make it more confusing!