have sb doing sth

题目

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?

答案

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.