have sth to do 和have sth do和have sth done和have sth doing有什么区别?

题目

have sth to do 和have sth do和have sth done和have sth doing有什么区别?
请举例说明一下

答案

have sth to do 有……事要做have sth done 叫某人做某事没有have sth do 只有 have sb do：让某人做也没有have sth doingI have a lot of homework to do.我有很多作业要要做.I have my hair cut.我叫人把头发剪了....