1. Ba often stayed up late.
- Ba used to stay up late.
2. Andy was once lazy.
- Andy used to be lazy.
3. Mr Hung doesn't teach us anymore.
- Mr Hung used to teach us.
4. People no longer use oil lamps.
- People used to use oil lamps.
5. My hair is much longer than that in the past.
-l used to have shorter hair than this.
- I used to have short hair in the past.
6. Did they often go to the beach?
- Did they use to go to the beach?