1. I usually stayed up late to watch football matches last year.
=> I used to stay up late to watch football matches last year.
2. There were some trees in the field.
=> There used to be some trees in the field.
3. She doesn't live with her parents anymore
=> She used to live with her parents more than now.
4. He is not a poor man anymore.
=> He used to be a rich man.
5. They didn't often go to the cinema every Sunday last year.
=> They didn't use to go to the cinama every Sunday last year.
6. My hair now is much longer than that in the past.
=> In the past my hair used to be shorter.
7. I don't have time to collect stamps as when I was in primary school.
=> I used to have much time to collect stamps when I was in primary school.