Questions & Answers about Paul joue avec le papa.
Because the subject is Paul, which is he / il.
The verb is jouer = to play. In the present tense:
- je joue = I play
- tu joues = you play
- il / elle joue = he / she plays
- nous jouons = we play
- vous jouez = you play
- ils / elles jouent = they play
So Paul joue means Paul plays or Paul is playing.
In French, the simple present tense often covers both:
- Paul plays
- Paul is playing
So Paul joue can mean either one, depending on context.
French does have ways to emphasize an action in progress, such as être en train de, but it is not required here:
- Paul est en train de jouer = Paul is in the middle of playing / Paul is playing right now
In a basic sentence, Paul joue is completely normal.