1.
2) They're going to play squash.
3) She is going to visit her grandma.
4) We're going to walk in the mountains.
5) We're going to wash the car.
2.
1) We're not going to help you.
2) Jack is not going to walk home.
3) Sue is not going to share her biscuits.
4) I'm not going to spend my holiday abroad this year.
5) I'm not going to sell my car.
3.
1) Is he going to cook dinner tonight?
2) Are you going to run in the race?
3) Are they going to climb that mountain?
4) Are we going to eat fish tonight?
5) Is he going to play football tomorrow?