1. Are; yes, I am (no, I'm not);
2. Do; yes, they do (no, they don't);
3. Did; yes, I did (no, I did not);
4. Are; yes, they are (no, they are not);
5. Is; yes, there is (no, there is not);
6. Were; yes, I was (no, I was not);
7. Have; yes, I have (no, I have not);
8. Has; yes, she has (no, she hasn't);
9. Was; yes, it was (no, it was not).