独自完成作业用英语怎么说

独自完成作业用英语可以说 "to work independently"。

来源：work independently 是由两个单词 "work" 和 "independently" 组成的。"work" 意思是工作、努力，"independently" 意思是独立地、自主地。

例句：

He prefers to work independently rather than in a group. 他更喜欢独立工作，而不是在团队中工作。
She has the ability to work independently and handle projects on her own. 她有独立工作和独立处理项目的能力。
The teacher encourages students to work independently on their homework. 老师鼓励学生独立完成作业。