1. Are you sitting next to the window? Yes, I am / No, I'm not.
2. Are you listening to music? Yes, I am / No, I'm not.
3. Are you using a pen? Yes, I am / No, I'm not.
4. Is your best friend sitting next to you? Yes, he is / No, he isn't.
5. Is your teacher smiling? Yes, he is / No, he isn't.
6. Are you friends studying? Yes, they are / No, they aren't