Ba often stayed up late

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