have sb doing sth
问题描述：
have sb doing sth
i have not been able to get the document but have sb hunting it.
have sb doing sth,让某人做某事,这种句型好像没见过,它和 ask sb to do sth 有什么不同?
答
have somebody doing something 的含义是“让某人一直干某事”.
ask somebody to do something和 have somebody do something 的意思相近,都是：让某人去干某事.