Ответ:
1. Is Simon reading a magazine? Yes, he is.
2. Is your computer working properly? No, it isn’t.
3. Are Vicky and Chloe watching a video? Yes, they are.
4. Are you doing your homework? Yes, I am.
1. I’ve never seen him before!
2. He’s cleaning the car all morning.
3. I’ve always liked dogs.
4. We’ve known Paul for a long time.
Надеюсь поможет!