What brings (brought)...? 怎么回事？

　　What brings ( brought ) you…？表示询问来到某处的目的（理由），表不“因何事来到这里?”。 You 后面可以接地点副词或 to+名词。一般常用的形态为 What brings ( brought ) you ( down ) here?

　　例句：

　　So, what brings you here at such a late hour?

　　怎么这么晚了才来这？

　　So, what brings you to New York?

　　什么风把你吹到纽约来了？

　　What brings you to the hospital?

　　你怎么来医院了？

　　对话：

　　A: What brings you here? I thought you were at home.

　　是什么风把你吹来的？我以为你在家呢。

　　B: I came to pick up some books that I forgot.

　　我来拿忘在这儿的书。