我快晕菜了~~帮帮我~~~

那位能帮我详细解释一下
have sb do
have sb/sth done
have sb/sth doing
有什么区别？？？？？
另外，据我所知，have sth done是让别人做某事。那么自己要做某事怎么说？

辨析have sb. doing/ have sb. do/ have sth. done

共同点：表示“/使/让/请某人干某事”
have sb. doing强调让某人/某物一直处于某种状态，
have sb. do则强调暂时或一次性的行为。
have / sth. done表示“让某事被做”，强调宾语和宾语补足语之间为动宾关系，而且宾语补足语的行为由他人来完成。例如：
(1) Yesterday I have my brother wash my clothes. 昨天我让弟弟给我洗了衣服。
(2) I’ll try my best to have him tell the truth. 我要尽全力叫他说实话。
(3)We ought to have her examined by the doctor. 我们应该让医生给她检查一下。
(4)I’ll have my watch repaired. 我得找人把我的手表修一下。
(5)He had the fire burning day and night. 他让火日夜燃烧着。
(6)Don't have your horse running so fast. 别老让你的马跑那么快。

I want to do sth

have sb do 让某人做某事
have sb/sth doing 让某人持续做某事
自己要做某事：have sth to do

have sb do sth:要某人做某事;
have +n.+doing:使.....被.....;
have +n.+done; 表示分词的动作正在进行.

have sth. done是很常见的句式，have是使役动词，表示“把（使，让）某事（被）做”，强调动作的 发生，不强调是谁做的。

比较与区别：
have sth. to do有…事要做
have sth./sb. do sth.让…做…
have sth/sb. doing sth .让…在做…