请看下面一道题：The operation was successful, but I still felt _________.
A. very painful            B. much painful       C. a lot of pain          D. very paining
【分析】此题很容易误选A，想当然地认为 painful 表示“感到疼痛的”，而其实 painful 的实际意思却是“使人感到疼痛的”、“使人感到痛苦的”，所以它通常只能用来说明事物，不宜用来说明人。所以此题应选C。又如：

Does it still feel painful? 它还疼吗？ My boots are still painful. 我的靴子仍夹得我的脚痛。He will never forget the painful experience for the rest of his life. 这一段痛苦的经历，他永生难忘。上面一题的最佳答案为C，pain 为名词，又如：Did you feel any pain? 你感觉痛吗？
Where is the pain? 哪儿痛？

要用形容词表示汉语的“感到疼痛的要AN>”，英语可用 pained。如：
We were all pained to hear of his death. 听到他的死讯，我们都很痛苦。

He looked rather pained at your remarks. 听了你的话他似乎很难受。