The operation was successful, but I still felt _________.
A. very painful B. much painful C. a lot of pain D. very paining
其实 painful 的意思并不是“感到疼痛的”，而是表示“使人感到疼痛的”、“使人感到痛苦的”，所以它通常用于说明事物，而不宜用于说明人。比较并体会：
正：He is still in pain.
误：He’s still painful.
正：Do you feel any pain?
误：Are you painful?
正：I am pained to see you living this way.
误：I am painful to see you living this way.
误：We were all painful to hear of his death.
正：We were all pained to hear of his death.
正：He has painful eyes.
误：He’s painful in the eyes.