在英语中，"他长大了"可以用 "he has grown up" 来表达。

"Grow up" 是一个短语，意思是成长、变老。它来源于 "grow" 这个动词，有 "生长"、"成长" 的意思。

下面是一些用 "he has grown up" 这个短语的例句，并附上中文翻译：

He has grown up to be a successful businessman. 他长大成了一名成功的商人。
I can't bepeve how much he has grown up since the last time I saw him. 真不敢相信自从上一次见他以来他已经长大这么多了。
She has grown up to be a beautiful and intelpgent young woman. 她长大成了一个漂亮且聪明的年轻女子。