Grammar Bank 3 C CAN , COULD, BE ABLE TO (ability and possibility)

a 1.  haven't been able to 2. be able to 3. won't be able to 4. to be able to 5. Will you be able to 6. I'd be able to7. I'll be able to 8.  not being able to.

b 1. can't 2. could 3. to be able to 4. won't be able to 5.can 6. to be able to 7. can  8. haven't been able to.