Previous study shows that ‘能neng’(can) can express volition in Modern Chinese, meanwhile, some scholars argue that ‘ke’(克, can) and ‘neng’(能, can) in Ancient Chinese can also denote volition. However, this paper demonstrates that most cases of the so-called volitional ‘ke’(克, can) and ‘neng’(能, can) should be treated as a kind of special ability, that is, mental capacity and psychological quality, and thus should be classified into ability. Only few cases of ‘neng’(能, can) express volition, but this meaning has not yet been conventionalized and is still a pragmatic meaning.