Grammar Note
pains 是动词 pain 的第三人称单数形式；作谓语时，主语常为引起疼痛/痛苦的事物，宾语为人。
使痛苦；使疼痛
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使痛苦；使疼痛
pains
It pains me to see so much food wasted.
看到这么多食物被浪费，让我十分痛心。
pain
Base
原形
pains
3rd person
第三人称单数
paining
-ing
现在分词
pained
Past
过去式
pained
Past participle
过去分词
It pains me to see you so upset.
看到你这么难过，让我感到很痛苦。
The news pained her greatly.
这个消息使她非常痛苦。
Her harsh words have pained me for a long time.
她那些严厉的话已使我痛苦了很久。
作“使痛苦、使疼痛”讲时为规则动词；主语是第三人称单数时用 pains，过去式和过去分词均为 pained。
The tight bandage pains her arm whenever she moves.
绷带太紧，使她每次动胳膊都感到疼痛。
Thinking about that mistake still pains him.
想起那个错误仍然让他痛苦。
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pains 是动词 pain 的第三人称单数形式；作谓语时，主语常为引起疼痛/痛苦的事物，宾语为人。
Dictionary facts from AI_FALLBACK, ECDICT, WIKTIONARY, WORDNET.