How do you say, "I sit at the table and do homework."
Thank you very much for your help.
3 Answers
Me siento a la mesa y (or para) hacer la tarea. ![]()

Me siento en una silla y uso la mesa para hacer la tarea. Since "me siento en la mesa..." it's literally putting one's bump on the table... so the right preposition is "a la mesa" but that's used to mean I'm going to sit down to eat. That's why I suggested the sentence at the beginning.
Me siento en la mesa y hacer la tarea