Simple Present
A: He speaks.
N: He does not speak.
Q: Does he speak?
action in the present taking place once, never or several times
facts
actions taking place one after another
action set by a timetable or schedule
always, every …, never, normally, often, seldom, sometimes, usuallyif sentences type I (If I talk, …)
Present Progressive
A: He is speaking.
N: He is not speaking.
Q: Is he speaking?
action taking place in the moment of speaking
action taking place only for a limited period of time
action arranged for the future
at the moment, just, just now, Listen!, Look!, now, right now