In the simple present tense, we make negatives with do and does. In the simple past tense, we make negatives with did.

1. I met them yesterday.

2. She called me a liar.

3. I waited for an hour.

4. She recognized him immediately.

5. The cat jumped out of the window.

6. He quit school at twelve.

7. She is looking for a job.

8. I have watered the plants.

9. She enjoys spending time with children.

10. He feeds stray dogs and cats.

11. He works hard to support his family.

12. She earns a hefty salary.

13. You are my boss.

14. We went to their house yesterday.

Answers

1. I did not meet them yesterday.

2. She did not call me a liar.

3. I did not wait for an hour.

4. She did not recognize him immediately.

5. The cat did not jump out of the window.

6. He did not quit school at twelve.

7. She is not looking for a job.

8. I have not watered the plants.

9. She does not enjoy spending time with children.

10. He does not feed stray dogs and cats.

11. He does not work hard to support his family.

12. She does not earn a hefty salary.

13. You are not my boss.

14. We did not go to their house yesterday.