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HOW VERBS DECAY

机译：动词衰减

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In English, a regular verb is one whose past tense ends in "ed," like helped. The past tense of an irregular verb, though, follows no easy rule: Consider got or bought. Now for frustrated English-language students everywhere, there is good news: A formula predicts when an irregular verb will convert to the regular form. However, they might have a long wait. Derived by Harvard University mathematician Erez Lieberman, the formula shows that verbs have their own "half-life," that is, the time it takes for half of the verbs in a particular group to become regular. The half-life is based on how popular a verb is: The more often it is used, the longer it will take to convert. For example, the verbs have and hold both have irregular forms in the past tense-had and held. Yet have is used roughly 100 times more often than hold. In line with that, we should expect held to become holded in nearly one-seventh the time (in about 5,400 years) it will take for had to become haved (in roughly 38,800 years).
机译：在英语中，常规动词是过去式以“ ed”结尾的词，如help。但是，不规则动词的过去式并不遵循简单的规则：考虑购买还是购买。现在对于到处都是沮丧的英语学生来说，有个好消息：一个公式可以预测不规则动词何时会转换为规则形式。但是，他们可能要等待很长时间。该公式由哈佛大学数学家埃雷兹·利伯曼（Erez Lieberman）推导得出，该公式表明动词具有自己的“半衰期”，即特定组中一半动词变为规则状态所花费的时间。半衰期取决于动词的流行程度：使用频率越高，转换所需的时间就越长。例如，动词在过去时态和保持时都具有不规则形式。然而，使用频率大约是持有频率的100倍。与此相一致，我们应该期望持有股票的时间大约是必须被收回的时间的七分之一（大约5400年），大约是38800年。

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