Examples
To form Yes/No questions, use the auxiliary + subject + going to + verb.
Are you going to be here tomorrow? Yes, I am. No, I'm not.
Is Fred going to call you? Yes, he is. No, he isn't / No, he's not.
Is Kim going to visit her family? Yes, she is. No, she isn't / No, she's not.
Is it going to be nice tomorrow? Yes, it is. Not, it isn't / No, it's not.
Are we going to have a grammar test on Tuesday? Yes, we are. No, we're not / No, we aren't.
Are they going to come to the meeting? Yes, they are. No, they're not / No, they aren't.