做某事是某人的梦想用英文怎么说

"To do something is someone's dream" 可以用 "something is a dream come true for someone" 或 "something is a dream come true for somebody" 表示。

其中 "dream come true" 是一个习惯用语，意思是某人梦想成真。

例句:

Being a doctor is a dream come true for John. (John 成为医生是他梦想成真。)
Winning the championship is a dream come true for the team. (夺冠是这支队伍的梦想成真。)
Travepng around the world is a dream come true for her. (环游世界是她的梦想成真。)