题目内容：

The boy said that he wanted to be a computer scient when he growing up还是写grew up

优质解答

grew up,因为前面有主语he,所以用谓语动词形式,去掉he就要用growing up,这样就是非谓语动词的用法
小男孩说当他长大后他要成为一名电脑科学家