Frequently, the words a prophet spoke on God's behalf were, in fact, foretelling what would happen later. However, the prophet's essential role was to speak for God, regardless of whether he did any predicting of the future. A prophet expresses the will of God in words, and sometimes he uses signs to back up what he says and to demonstrate God's power behind it.
In a similar way, a false prophet also may not be in the business of foretelling the future. A false prophet is simply someone who speaks for another but falsely. False prophets either speak for the wrong god, or they claim to have heard from the true God but do not accurately represent Him or His words. At the very least, they speak out of their own human hearts, but more likely, the "god" they are speaking for is really a demon.
In a similar way, a false prophet also may not be in the business of foretelling the future. A false prophet is simply someone who speaks for another but falsely. False prophets either speak for the wrong god, or they claim to have heard from the true God but do not accurately represent Him or His words. At the very least, they speak out of their own human hearts, but more likely, the "god" they are speaking for is really a demon.