Can could be able to

_____ you understand what we were talking about?. Could. Coulded. Cans.

My brother Tom _____ play soccer now. can. could. couldn't. will can.

I _____ walk when I was less than a year old. can. could. will can. will.

(Polite) _____ you tell me what time it is, please?. Can. Could. Will.

My grandpa ________ walk without any help last night. was able to. could able to. can.

I would like to ________ play the piano. can. could. be able to.

How long have you ________ drive?. can. couldn't. been able to.

I'll ________ help you later. can. could. be able to.

Can you help me? I ________ never understand this. can't. can. cannot. am able to.

Will people ________ live forever one day?. could be. be able to. could be able to.