Complex sentence: He injured his spinal cord and wasn't given any chance to ever walk again, but after five months of rehabilitation in the hospital and a few months in a wheel chair he was able to regain the use of his legs.
Split into simpler sentences: He injured his spinal cord and wasn't given any chance to ever walk again. After five months of rehabilitation in the hospital and a few months in a wheel chair he was able to regain the use of his legs.