have sb doing 使某人做某事,表示事情还在进行当中
have sb done 使某人做某事,事情也已完成
have sb to do 使某人做某事,表示事情准备进行,
have sb do sth是指让某人做某事,强调一次性的动作.
have sb doing sth是指让某人一直做某事,强调动作的持续性、连续性或者动作的反复性.
I had Mary clean my bedroom yesterday.
昨天我让玛丽打扫了我的卧室.(一次性的动作)
He had us laughing during the lunchtime.
他让我们在午饭期间一直笑个不停.(动作的连续性)