Can, Could, Be able to

_____ he understand what you were talking about?

• Could

• Cans

• Coulded

My sister _____ play tennis now.

• can to

• can

• will can

I _____ walk when I was less than a year old.

• can

• could

• have can

(Polite) _____ you tell me what time it is, please?

• Could

• Can

• Will

My grandfather ________ walk without any help last night.

• can

• could

• was able to

I would like to ________ play the piano.

• can

• could

• be able to

How long have you ________ drive?

• can

• coulded

• been able to

I'll ________ help you later.

• can

• could

• be able to

Can you help me? I ________ never understand this.

• can

• cannot

• am able to

Will people ________ live forever one day?

• could be

• be able to

• could be able to