He can play the piano
I can play the piano. My brother can play the piano too.
Sara can speak Italian, but she can’t speak Spanish.
Can you swim. Yes, but I’m not a good swimmer.
Can you change twenty pounds. I’m sorry I can’t.
I’m having a party next week, but Paul and Rachel can’t come.
When I was young. I could run very fast.
Before Maria came to Britain, she couldn’t understand much English. Now she can understand everything.
I was tired last night, but I couldn’t sleep.
I had a party last week, but Paul and Rachel couldn’t come.
Can you open the door please? or Could you open the door please?
Can you wait a moment, please? or Could you wait a moment, please?
Can I have a glass of water, please? or Can I get a glass of water, please?
Can I sit here?
Tom, could I borrow your umbrella.