Dưới đây là các câu đã được viết lại với "used to":

1. Dance marathon **used to** be popular in America.
2. The competitors **used to** eat twelve times a day for energy.
3. Michael **used to** live in New York.
4. We **used to** often go to the zoo when we were young.
5. He **used to** play games, but he no longer does.
6. She **used to** wear this dress, but she doesn't anymore because it is torn.
7. Children in Vietnam in the seventies **used to** play bamboojacks, but they don’t anymore.
8. In the past, Michael **used to** live in New York.
9. In the 1920s, dance marathons **used to** be a very popular competition, but now they’re not.
10. In the past, people **used to** have fewer kinds of smart phones.