I could / can do gymnastics when I was young.
Why couldn't / cann't you come to the party? It was great.
Ethan can't / couldn't play football because he hasn't got his trainers.
Dad couldn't / could drive when he was fourteen,but he could / can now.
Leo and ella can / could speak French, but they don'tspeak French very often.
Grandpa was a swimmer when he was young.He can't / can swim now,but he couldn't / could then.
I've lost my keys. I can't / coulden't openthe door when I got home.