过为已甚 go too far
Explanation
指做得太过分了。含有劝诫的意味，通常用于劝说对方适可而止。
It means that something has been overdone. It carries a cautionary meaning and is usually used to persuade someone to stop.
Origin Story
从前，有个秀才勤奋好学，为了准备科举考试，他日夜苦读，废寝忘食。他认为只有这样才能考取功名，光宗耀祖。他的妻子劝他注意休息，但他不听，仍然刻苦用功。有一天，他突然晕倒，妻子赶紧把他送去医治。大夫诊断后说，他因过度劳累，导致身体亏损，需要好好调养。这时，秀才才意识到自己的行为过为已甚，他静下心来好好休息，身体逐渐康复。这次经历让他明白，学习固然重要，但也要注意劳逸结合，过犹不及。
Once upon a time, there was a diligent scholar who studied day and night to prepare for the imperial examination. He believed that this was the only way to achieve fame and glory for his ancestors. His wife advised him to rest, but he didn't listen and continued to study hard. One day, he suddenly fainted, and his wife quickly took him to a doctor. The doctor diagnosed that he had suffered from excessive fatigue, and that his body was deficient. The scholar realized that he had overdone it. He rested and his body gradually recovered. This experience taught him that studying is important, but one should also pay attention to rest and avoid overdoing it.
Usage
用作谓语；指做得太过分了。
Used as a predicate; means that something has been overdone.
Examples
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他的批评虽然是善意的，但过为已甚，让人难以接受。
tā de pīpíng suīrán shì shànyì de, dàn guò wéi yǐ shèn, ràng rén nán yǐ jiēshòu。
His criticism, though well-intentioned, went too far and was difficult to accept.
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你对他的帮助本是好意，但过为已甚反而让他觉得你是在施舍。
nǐ duì tā de bāngzhù běn shì hǎoyì, dàn guò wéi yǐ shèn fǎn'ér ràng tā juéde nǐ shì zài shīshè
Your help was well-meaning, but you went overboard and made him feel like you were patronizing him