1. We didn't used to have a colorful TV, but we do now. → use `-` Thì quá khứ đơn câu phủ định: S + didn't + Vinf
2. When my baby sister is younger, she didn't use to eat pizza. → was `-` Used to diễn tả thói quen trong quá khứ không liên quan đến hiện tại
3. It's about 500 meters at my house to school. → from `-` It is about + khoảng cách + from A to B
4. What about go to the park on foot?`-` It is a good idea. → going `-` What about + Ving
5. Did he use to crying all night when his father died? → cry `-` Used to + Vinf