他变得积极了英文怎么说

当某人变得积极了，我们可以用英语表达为 "He became more positive." 或者 "He turned a corner and became more optimistic."

这个表达的来源源于"positive" 这个形容词，它的意思是乐观的，积极的。"Turn a corner" 这个短语的意思是转变，改变。

一些英文例句和中文翻译如下：

He used to be negative all the time, but lately he's become more positive. 他以前总是消极，但最近他变得更积极了。
After going through a tough time, she turned a corner and became more optimistic. 经历了艰难时期之后，她转变了，变得更乐观了。