They are all pronounced exactly the same. You need to listen for the subject and memorize the endings. I know... "ent" should not be a silent ending, but it is! Here are your er verb endings: Je e Tu es Il / Elle e
Nous ons Vous ez Ils/ Elles ent
You have to commit them to heart. No other way to learn them. Best 10 minutes of French study ever. Nearly all French verbs are "er" verbs. You will have mastered most of the present tense once you have the endings memorized. Bonne chance !