$1$. Did you use to go to the beach when you lived in NhaTrang?
$2$. Linda used to live with her parents
$3$. I used to collect stamps when I was in primaryschool.
$4$. He used to be a poor man
$5$. They didn’t use to go to the cinema every Sunday last year.
$6$. In the past my hair used to much shorter
$7$. I used to stay up late to watch football matches last year