Answered on your last post! :)
1) Se bueno con los primos.-> Be good with your cousins.2) Tienes que hablar educamente.-> You have to speak politely.3) No puedes faltar el respeto.-> You cannot be irrespectful.4) Tienes que comportarte y tener modales.-> You need to behave and have manners.5) Tienes que ayudar con la cena,-> You need to help out with dinner,6) No puedes pelear con tus hermanos.-> You cannot fight with your brothers (siblings).7)Tienes que limpiar la casa-> You need to clean the house.8)Vamos a comprar mucha comida.-> We are going to buy alot of food.9) Tienes que ponerle atencion a tu abuelo.-> You need to pay attention to your grandfather.10) Tienes que ir a cenar a tiempo.-> You need to eat dinner on time.
Since the description says to write it in affirmative (positive form) , here are all of those that I wrote above, using "no", this time, affirmatively.
3) Se respetuoso. = Be respectful.6) Debes comportarte con tus hermanos. = You need to behave with your brothers (siblings).