A: Could Greg speak French?
B: Yes, he could.
A: Could Greg and Lou draw well?
B: No, they couldn’t.
A: Could Lou ride a bike?
B: Yes, she could.
A: Could Greg make biscuits?
B: No, he couldn’t.
A: Could Lou and Greg climb trees?
B: Yes, they could.
When I was eight years old, I could ride a bike and draw well, but I couldn’t speak French.