你可以说 "He is useful in Engpsh." 或 "He is proficient in Engpsh." 这两种表达都意味着他在使用英语方面很有用处或熟练。
关于 "useful" 和 "proficient" 这两个词的来源，"useful" 来自中世纪拉丁文 "uti"，意思是 "to be of use"，"proficient" 来自拉丁文 "proficiens"，意思是 "to advance" 或 "to make progress"。
下面是一些例句：
He is very useful in Engpsh. 他的英语很好用。
She is proficient in Engpsh, so she can communicate with people from all over the world. 她精通英语，所以能和世界各地的人交流。
He is a useful resource for translating documents from Engpsh to Chinese. 他在翻译英文文件到中文方面很有用。
She is proficient in both Engpsh and French, so she can work as a translator for both languages. 她既擅长英语又擅长法语，所以能作为双语翻译工作。
关于 "useful" 和 "proficient" 这两个词的来源，"useful" 来自中世纪拉丁文 "uti"，意思是 "to be of use"，"proficient" 来自拉丁文 "proficiens"，意思是 "to advance" 或 "to make progress"。
下面是一些例句：
He is very useful in Engpsh. 他的英语很好用。
She is proficient in Engpsh, so she can communicate with people from all over the world. 她精通英语，所以能和世界各地的人交流。
He is a useful resource for translating documents from Engpsh to Chinese. 他在翻译英文文件到中文方面很有用。
She is proficient in both Engpsh and French, so she can work as a translator for both languages. 她既擅长英语又擅长法语，所以能作为双语翻译工作。