2.
2 I am not enjoying this party very much. Shall we go home?
3 Kate's friends aren't waiting for her because she isn't ready.
4 I'm looking for my mobile, but you aren't helping me!
5 Harry's mum is trying to choose a jacket for him, but he isn't looking at the jackets. He is looking at the DVDs.
3.
2 Are you making a cake? Yes, you are.
3 Are we moving? No, we aren't.
4 Is the rain coming in? Yes, it is.
5 Is your brother winning? No, he isn't.
6 Are they playing well? No, they aren't.