- Yes, I do know about the accident.
- I'd love to know about the plan.
- He's such an ostrich he doesn't want to know about his wife's love affairs.
- This is all I know about it; for the rest, you may ask others.
- If someone in the classroom has AIDS does the teacher know about it?
- I feel that I know about the value of my own work.
- I happened to know about him.
- Do you know about the evolution of a seed into a plant?