We can use going to to talk about our future plans. I'm going to be a teacher when I'm older. He's not going to play football anymore. Are you going to buy a new T-shirt?
Use am, is or are with going to and the infinitive. I'm going to write my homework tonight. They're going to watch a film this weekend.
For negatives, use not after am, is or are. I'm not going to read that book. He's not going to ride a bike. He isn't going to ride a bike. They're not going to visit us. They aren't going to visit us.
For questions, change the order of am, is or are and the person. Are you going to buy a new T-shirt? Yes, I am. Is she going to have pizza for dinner? No, she isn't. What are we going to do tonight?