ABILITY AND POSSIBILITY

My parents ... (ride) a bike. They go cycling in the mountains. (can/can't)

Ruby ... (swim). She’s afraid of water. (can't/couldn't)

I remember the first time I went surfing. I .... stay on the board! It was so difficult! (could/couldn't)

... you play tennis when you were five? (can/could)

Lily ... (run) very fast. She won a competition last month. (can/could)

Mark and Karen ... (surf). They take their boards to the beach every weekend. (can/couldn't)

I ... (skateboard). I tried it once, but I fell off all the time. I didn’t enjoy it. (can/can't)

A) ... you ski, Max? B) No, I ..... , but I ..... skateboard so I think it will be easy for me to learn!