1. _____ he understand what you were talking about? Could Cans Coulded 2. My sister _____ play tennis now. can to can will can 3. I _____ walk when I was less than a year old. can could have can 4. (Polite) _____ you tell me what time it is, please? Could Can Will 5. My grandfather ________ walk without any help last night. can could was able to 6. I would like to ________ play the piano. can could be able to 7. How long have you ________ drive? can coulded been able to 8. I'll ________ help you later. can could be able to 9. Can you help me? I ________ never understand this. can cannot am able to 10. Will people ________ live forever one day? could be be able to could be able to