1)They don't present their plays in Drama Club.
Do they present their plays in Drana Club?
2)I don't go swimming with my friends every Saturday .
Do I go swimming with my friends every Saturday?
3)You win your brother. //раз не побеждает, то логично, что отрицание - просто побеждает))
You never win your brother, do you? //мне кажется, тут разделительный вопрос "не так ли"
4)My marbles are not always with me.
Are my marbles always with me?
5)He does not paint very well.
Does he paint very well?