What are you going to be?
这一句是按语法问的,如果想表达出意思也可以用What do you want to be?但一般考试写题时只能用What are you going to be?至于what are you want to be.就是一句病句,不能用.
在口语中going to=gonna,如
A:What are you gonna be?
B:I'm gonna be an artist.