1. I do morning exercises. I don’t do morning exercises. I did morning exercises.
2. He work at a factory. He don’t work at a factory. He worked at a factory.
3. She sleeps after dinner. She doesn’t sleep after dinner. She slept after dinner.
4. We work part-time. We don’t work part-time. We didn’t work part-time.
5. They drink tea every day. They don’t drink tea every day. They didn’t drink tea every day.
6. Mike is a student. Mike isn’t a student. Mike was a student.
7. Helen have a car. Helen have not a car. Helen had a car.
8. You are good friend. You aren’t a good friend. You were a good friend.
9. You are good friends. You are not good friends. You were good friends.
10. It’s difficult to remember everything. It’s not difficult to remember everything. It was difficult to remember everything.