他变得非常自信英语怎么说

"他变得非常自信"可以用英文表示为"He became very confident." 或者"He gained a lot of confidence."

"自信"的英文是confidence，它指的是对自己能力或自己的信心。例如：

She has a lot of confidence in her abilities. (她对自己的能力很有信心。)
He gained confidence after taking that course. (他在学完那门课后变得很自信。)

自信可以来自许多不同的因素，例如经历成功的经历、接受培训或教育、获得赞扬或表扬、从失败中吸取教训等。例如：

She gained confidence from receiving positive feedback from her manager. (她从经理那里得到的正面反馈中获得了信心。)
He became more confident after learning how to swim. (他学会了游泳后变得更自信。)