“The goal of tennis is to hit the ball over the net into the other player’s court. When the other player cannot return the ball, a point is won. The game is played with two people, it is called “singles”, and when it is played with four people, it is called “doubles.”
Yes this is true because we can not tell if someone is joking or not or we can’t tell if they are being sarcastic which can lead to miss understandings
Yes, you would need to put a comma right there.