have sb do sth 让某人做某事(do前的to省略,或者说不能加)
have sb doing sth 其实也有,但一般用keep sb doing ,让某人一直做某事
have sth to do 有某事要做 如,i have a lot of homework to do
have sb do sth 让某人做某事(do前的to省略,或者说不能加)
have sb doing sth 其实也有,但一般用keep sb doing ,让某人一直做某事
have sth to do 有某事要做 如,i have a lot of homework to do