Her arm hurt .检查错误

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Her arm hurt .检查错误

她胳膊受伤了 Her arm was hurt.
她胳膊疼 Her arm hurts.其实过去式Her arm hurt.也没错!

arm 有单复数之分,要符合主谓一致原则

She hurt her arm. 是她的手臂受伤了。
Her arm hurt. 是她的手臂疼

hurts